diff --git a/.github/workflows/_ci-desktop.yml b/.github/workflows/_ci-desktop.yml
index 108e18a2152..15893a1cb4e 100644
--- a/.github/workflows/_ci-desktop.yml
+++ b/.github/workflows/_ci-desktop.yml
@@ -24,7 +24,10 @@ jobs:
   desktop-core:
     name: Desktop Core
     runs-on: ubuntu-latest
-    timeout-minutes: 45
+    # The compiled-flag verification step rebuilds the workspace for each
+    # BUZZ_BUILD_* state and runs the full suite under all three compile
+    # states; the complete recipe needs ~46m, so budget 60m.
+    timeout-minutes: 60
     if: github.event_name == 'push' || inputs.desktop || inputs.desktop_rust || inputs.rust
     permissions:
       contents: read
diff --git a/desktop/src/features/channels/lib/memberUtils.test.mjs b/desktop/src/features/channels/lib/memberUtils.test.mjs
new file mode 100644
index 00000000000..751e7d415e2
--- /dev/null
+++ b/desktop/src/features/channels/lib/memberUtils.test.mjs
@@ -0,0 +1,121 @@
+import { strict as assert } from "node:assert";
+import test from "node:test";
+
+import { canonicalNpub, truncateNpub } from "@/shared/lib/pubkey";
+import { compareMembersByRole, formatMemberName } from "./memberUtils.ts";
+
+// Sequential-value pubkeys, the same shape as the members-sidebar e2e
+// roster fixture: every full npub shares the `npub1qqq…` head, so the
+// compact label is decided by the checksum tail while the full npub
+// diverges mid-key. These two keys disagree between the two orders.
+const V5_HEX =
+  "0000000000000000000000000000000000000000000000000000000000000005";
+const V5_NPUB =
+  "npub1qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqzsfj2hcx";
+const V24_HEX =
+  "0000000000000000000000000000000000000000000000000000000000000018";
+const V24_NPUB =
+  "npub1qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqvq532w5c";
+
+function member(pubkey, overrides = {}) {
+  return {
+    pubkey,
+    role: "member",
+    isAgent: false,
+    joinedAt: "2026-09-08T00:00:00Z",
+    displayName: null,
+    ...overrides,
+  };
+}
+
+function rosterOrder(members, currentPubkey) {
+  return [...members]
+    .sort((left, right) => compareMembersByRole(left, right, currentPubkey))
+    .map((item) => item.pubkey);
+}
+
+test("unnamed members order by full canonical npub, not the compact label", () => {
+  assert.equal(canonicalNpub(V5_HEX), V5_NPUB);
+  assert.equal(canonicalNpub(V24_HEX), V24_NPUB);
+  // Compact labels order V5 first (`…2hcx` < `…2w5c`); the full npubs
+  // disagree (`…vq53…` < `…zsfj…`). Ordering follows the full key.
+  assert.ok(truncateNpub(V5_HEX).localeCompare(truncateNpub(V24_HEX)) < 0);
+  assert.ok(V24_NPUB.localeCompare(V5_NPUB) < 0);
+
+  const v5 = member(V5_HEX);
+  const v24 = member(V24_HEX);
+
+  assert.deepEqual(rosterOrder([v5, v24]), [V24_HEX, V5_HEX]);
+  assert.deepEqual(rosterOrder([v24, v5]), [V24_HEX, V5_HEX]);
+
+  // The compact 8+4 label stays the display form.
+  assert.equal(formatMemberName(v5), "npub1qqq…2hcx");
+  assert.equal(formatMemberName(v24), "npub1qqq…2w5c");
+
+  // Authored names still order against npub surfaces as before.
+  const bob = member("0".repeat(64), { displayName: "Bob" });
+  assert.deepEqual(rosterOrder([v5, bob, v24]), [
+    "0".repeat(64),
+    V24_HEX,
+    V5_HEX,
+  ]);
+});
+
+test("duplicate authored names tie-break by the full identity key", () => {
+  const lowHexName = member(V5_HEX, { displayName: "Ada" });
+  const highHexName = member(V24_HEX, { displayName: "Ada" });
+
+  // Same name, distinct keys: the tie breaks by canonical npub (which
+  // reverses the raw hex order of these two keys), in both input orders.
+  assert.deepEqual(rosterOrder([lowHexName, highHexName]), [V24_HEX, V5_HEX]);
+  assert.deepEqual(rosterOrder([highHexName, lowHexName]), [V24_HEX, V5_HEX]);
+});
+
+test("role precedence still outranks the name stage", () => {
+  const owner = member("1".repeat(64), { role: "owner", displayName: "Zed" });
+  const admin = member("2".repeat(64), { role: "admin", displayName: "Yan" });
+  const plain = member("3".repeat(64), { role: "member", displayName: "Xan" });
+  const guest = member("4".repeat(64), { role: "guest", displayName: "Wes" });
+  const bot = member("5".repeat(64), { role: "bot", displayName: "Ann" });
+
+  assert.deepEqual(rosterOrder([bot, guest, plain, admin, owner]), [
+    "1".repeat(64),
+    "2".repeat(64),
+    "3".repeat(64),
+    "4".repeat(64),
+    "5".repeat(64),
+  ]);
+});
+
+test("the current member still sorts first in compareMembersByRole", () => {
+  const current = member(V24_HEX);
+  const owner = member("1".repeat(64), { role: "owner", displayName: "Ada" });
+
+  assert.deepEqual(rosterOrder([owner, current], V24_HEX), [
+    V24_HEX,
+    "1".repeat(64),
+  ]);
+  assert.ok(compareMembersByRole(current, owner, V24_HEX) < 0);
+  assert.ok(compareMembersByRole(owner, current, V24_HEX) > 0);
+
+  // Without a current pubkey, roles lead again.
+  assert.ok(compareMembersByRole(current, owner) > 0);
+});
+
+test("invalid keys keep the neutral surface and break ties deterministically", () => {
+  const first = member("not-a-key");
+  const second = member("zzz-definitely-not-a-key");
+
+  // Both render the neutral label — never raw input — and the label
+  // collision breaks by the normalized key, not incoming order.
+  assert.equal(formatMemberName(first), "Unavailable");
+  assert.equal(formatMemberName(second), "Unavailable");
+  assert.deepEqual(rosterOrder([second, first]), [
+    "not-a-key",
+    "zzz-definitely-not-a-key",
+  ]);
+  assert.deepEqual(rosterOrder([first, second]), [
+    "not-a-key",
+    "zzz-definitely-not-a-key",
+  ]);
+});
diff --git a/desktop/src/features/channels/lib/memberUtils.ts b/desktop/src/features/channels/lib/memberUtils.ts
index 10ad4b7ff0a..401fc1f51cb 100644
--- a/desktop/src/features/channels/lib/memberUtils.ts
+++ b/desktop/src/features/channels/lib/memberUtils.ts
@@ -1,5 +1,10 @@
 import type { ChannelMember } from "@/shared/api/types";
-import { truncateNpub } from "@/shared/lib/pubkey";
+import {
+  canonicalNpub,
+  normalizePubkey,
+  truncateNpub,
+  UNAVAILABLE_KEY_LABEL,
+} from "@/shared/lib/pubkey";
 
 export const roleOrder: Record<ChannelMember["role"], number> = {
   owner: 0,
@@ -20,6 +25,59 @@ export function formatMemberName(
   return member.displayName ?? truncateNpub(member.pubkey);
 }
 
+/**
+ * Ordering surface for a member's name: the authored name when present,
+ * else the FULL canonical npub. Separate from `formatMemberName` — the
+ * compact `npub1abcd…wxyz` label is display-only, and ordering on it would
+ * collapse two distinct identities that merely share a prefix and tail.
+ * Undisplayable keys keep the neutral label as their surface, exactly as
+ * they render.
+ */
+function memberNameSurface(member: ChannelMember): string {
+  return (
+    member.displayName ?? canonicalNpub(member.pubkey) ?? UNAVAILABLE_KEY_LABEL
+  );
+}
+
+/**
+ * Full identity key used to break name-surface ties: the canonical npub of
+ * a valid identity, else the normalized raw key so every tie is decided.
+ * An ordering key only — never rendered or copied.
+ */
+function memberIdentityKey(member: ChannelMember): string {
+  return canonicalNpub(member.pubkey) ?? normalizePubkey(member.pubkey);
+}
+
+/**
+ * Shared name/key ordering authority for the roster comparators.
+ *
+ * Authored names keep the existing `localeCompare` semantics; unnamed
+ * members order by their full canonical npub (the compact label stays
+ * display-only); collation-equal surfaces — duplicate authored names,
+ * matching labels, invalid keys — break by full identity key, so the
+ * incoming membership-event order is never the tie policy. Comparators
+ * layer their own role/current-user precedence around this stage; this
+ * helper owns only the name ordering.
+ */
+export function compareMemberNames(
+  left: ChannelMember,
+  right: ChannelMember,
+): number {
+  const surfaceDelta = memberNameSurface(left).localeCompare(
+    memberNameSurface(right),
+  );
+  if (surfaceDelta !== 0) {
+    return surfaceDelta;
+  }
+
+  const leftKey = memberIdentityKey(left);
+  const rightKey = memberIdentityKey(right);
+  if (leftKey === rightKey) {
+    return 0;
+  }
+  return leftKey < rightKey ? -1 : 1;
+}
+
 export function compareMembersByRole(
   left: ChannelMember,
   right: ChannelMember,
@@ -35,5 +93,5 @@ export function compareMembersByRole(
   if (roleDelta !== 0) {
     return roleDelta;
   }
-  return formatMemberName(left).localeCompare(formatMemberName(right));
+  return compareMemberNames(left, right);
 }
diff --git a/desktop/src/features/channels/ui/MembersSidebar.tsx b/desktop/src/features/channels/ui/MembersSidebar.tsx
index 3c9afbfaeca..2a125e0d014 100644
--- a/desktop/src/features/channels/ui/MembersSidebar.tsx
+++ b/desktop/src/features/channels/ui/MembersSidebar.tsx
@@ -16,7 +16,10 @@ import {
 } from "@/features/agents/lib/agentAutocompleteEligibility";
 import { useIsArchivedPredicate } from "@/features/identity-archive/hooks";
 import { useClassifiedMembers } from "@/features/channels/lib/useClassifiedMembers";
-import { formatMemberName } from "@/features/channels/lib/memberUtils";
+import {
+  compareMemberNames,
+  formatMemberName,
+} from "@/features/channels/lib/memberUtils";
 import {
   canAddChannelMembers,
   PRIVATE_CHANNEL_ADD_DENIED_MESSAGE,
@@ -120,7 +123,7 @@ function compareMembersForModal(
   if (currentPubkey && left.pubkey === currentPubkey) return -1;
   if (currentPubkey && right.pubkey === currentPubkey) return 1;
 
-  return formatMemberName(left).localeCompare(formatMemberName(right));
+  return compareMemberNames(left, right);
 }
 
 type MembersSidebarProps = {
diff --git a/desktop/tests/e2e/channels.spec.ts b/desktop/tests/e2e/channels.spec.ts
index 371cffdfb0b..b7cf2c23cbf 100644
--- a/desktop/tests/e2e/channels.spec.ts
+++ b/desktop/tests/e2e/channels.spec.ts
@@ -27,6 +27,15 @@ const OWNED_RELAY_AGENT_PUBKEY =
   "a1b2c3d4e5f60718293a4b5c6d7e8f90112233445566778899aabbccddeeff00";
 const DM_RELAY_AGENT_PUBKEY =
   "eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee";
+// Unnamed roster fixtures whose two plausible orders disagree (the e2e twin
+// of the memberUtils unit pair): both keys share the `npub1qqq…` head, so
+// the compact display labels order V5 first (`…2hcx` < `…2w5c`) while the
+// full canonical npubs order V24 first (`…vq53…` < `…zsfj…`). Only the
+// full-npub order is correct for the roster.
+const UNNAMED_MEMBER_V5_PUBKEY =
+  "0000000000000000000000000000000000000000000000000000000000000005";
+const UNNAMED_MEMBER_V24_PUBKEY =
+  "0000000000000000000000000000000000000000000000000000000000000018";
 
 type MockFeedWindow = Window & {
   __BUZZ_E2E_EMIT_MOCK_MESSAGE__?: (input: {
@@ -4177,8 +4186,9 @@ test("members sidebar virtualizes large channel rosters", async ({ page }) => {
   expect(await memberRows.count()).toBeLessThan(50);
 
   // Generated members have no display name, so the roster sorts them by
-  // their npub fallback label: these sequential pubkeys share a `npub1qqq…`
-  // prefix and order by the checksum tail, not their numeric value. Resolve
+  // their full canonical npub: these sequential pubkeys share an
+  // `npub1qqq…` head and diverge mid-key, while the compact label's
+  // checksum tail is display-only and decides nothing. Resolve
   // a generated member from the rows the initial window actually rendered
   // instead of assuming `pubkeys[0]` sorts into that window.
   const generatedPubkeySet = new Set(pubkeys);
@@ -4253,6 +4263,57 @@ test("members sidebar virtualizes large channel rosters", async ({ page }) => {
   ).toBeVisible();
 });
 
+test("members sidebar orders unnamed members by full canonical npub", async ({
+  page,
+}) => {
+  await page.goto("/");
+  const channelId = await page
+    .getByTestId("channel-random")
+    .getAttribute("data-channel-id");
+  if (!channelId) {
+    throw new Error("Random channel id missing.");
+  }
+
+  // Added in the opposite of the expected order, so incoming membership
+  // order can never satisfy the assertion on its own.
+  await invokeMockCommand(page, "add_channel_members", {
+    channelId,
+    pubkeys: [UNNAMED_MEMBER_V5_PUBKEY, UNNAMED_MEMBER_V24_PUBKEY],
+    role: "member",
+  });
+
+  await openMembersSidebar(page, "random");
+  // "random" seeds alice, the mock identity, and bob, so the two unnamed
+  // fixtures round out a five-row roster that the initial virtual window
+  // renders entirely — both fixtures are visible without scrolling.
+  await expect(
+    page.getByTestId(`sidebar-member-${UNNAMED_MEMBER_V24_PUBKEY}`),
+  ).toBeVisible();
+  await expect(
+    page.getByTestId(`sidebar-member-${UNNAMED_MEMBER_V5_PUBKEY}`),
+  ).toBeVisible();
+
+  // The compact labels (`npub1qqq…2hcx` < `npub1qqq…2w5c`) would order V5
+  // first; the full canonical npubs disagree and order V24 first. The
+  // rendered roster must follow the full key, not the display label.
+  const renderedOrder = await page
+    .getByTestId("members-sidebar-people")
+    .locator('[data-index] > [data-testid^="sidebar-member-"]')
+    .evaluateAll((rows) =>
+      rows.map(
+        (row) =>
+          (row as HTMLElement).dataset.testid?.slice(
+            "sidebar-member-".length,
+          ) ?? "",
+      ),
+    );
+  const v24Position = renderedOrder.indexOf(UNNAMED_MEMBER_V24_PUBKEY);
+  const v5Position = renderedOrder.indexOf(UNNAMED_MEMBER_V5_PUBKEY);
+  expect(v24Position).toBeGreaterThanOrEqual(0);
+  expect(v5Position).toBeGreaterThanOrEqual(0);
+  expect(v24Position).toBeLessThan(v5Position);
+});
+
 test("opening a human-only members sidebar skips managed runtime discovery", async ({
   page,
 }) => {