diff --git a/CHANGELOG.d/2.12.6-provider-error-boundary.md b/CHANGELOG.d/2.12.6-provider-error-boundary.md
index 99a2fbd4d..927fad08e 100644
--- a/CHANGELOG.d/2.12.6-provider-error-boundary.md
+++ b/CHANGELOG.d/2.12.6-provider-error-boundary.md
@@ -1,4 +1,5 @@
 ## Fixed
 
 - Keep contextual-orchestrator, OIDC, RankWeave, TEPP, and durable-ingestion diagnostics behind stable product error boundaries while retaining the original exception for server-side chaining.
+- Route browser transport and tenant-settings failures through the same boundary so 5xx provider details never reach buyer-facing error text.
 - Keep browser 5xx and transport failures behind the same stable client error boundary.
diff --git a/docs/adr/0123-provider-error-boundary.md b/docs/adr/0123-provider-error-boundary.md
index 48610ebeb..5cc6289d1 100644
--- a/docs/adr/0123-provider-error-boundary.md
+++ b/docs/adr/0123-provider-error-boundary.md
@@ -24,9 +24,9 @@ cannot escape as raw ``KeyError`` or type-error payloads from a library
 boundary.
 
 The browser API client is a second trust boundary: HTTP 5xx details are
-discarded, and transport failures become a stable status-0 client error
-before any UI handler can render them. Client-error details remain available
-only for actionable validation or authorization responses.
+discarded, and transport failures become a stable status-0 client error before
+any UI handler can render them. Client-error details remain available only for
+actionable validation or authorization responses.
 
 Missing or malformed evidence remains unavailable; it is never converted into
 a fabricated negative result. Existing input-validation errors outside a
diff --git a/frontend/src/PostBody.test.tsx b/frontend/src/PostBody.test.tsx
index 1a9b00c4a..86beb01c5 100644
--- a/frontend/src/PostBody.test.tsx
+++ b/frontend/src/PostBody.test.tsx
@@ -295,6 +295,44 @@ describe("PostBody", () => {
     expect(screen.getByText("Panel")).toBeInTheDocument();
   });
 
+  it("keeps escaped pipes and does not invent headers for unmarked region OCR", () => {
+    render(
+      <PostBody
+        body={'<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNk+A8AAQUBAScY42YAAAAASUVORK5CYII=" />'}
+        imageContent={[
+          {
+            unit_index: 0,
+            mime_type: "image/png",
+            status_code: "described",
+            extracted_text: "| Item | State |\n| --- | --- |\n| Review \\| approve | Ready |",
+            caption: "A table image",
+            tags: [],
+            regions: [
+              {
+                region_index: 0,
+                x_ratio: 0,
+                y_ratio: 0,
+                width_ratio: 1,
+                height_ratio: 1,
+                status_code: "described",
+                extracted_text: "| 1 | Panel |\n| 2 | Ready |",
+                caption: "An OCR region without a Markdown header marker.",
+                tags: [],
+              },
+            ],
+          },
+        ]}
+      />,
+    );
+
+    expect(screen.getByText("Review | approve")).toBeInTheDocument();
+    expect(screen.getByRole("columnheader", { name: "Item" })).toBeInTheDocument();
+    expect(screen.queryByRole("columnheader", { name: "1" })).not.toBeInTheDocument();
+    expect(document.querySelector(".post-image-region-text p")?.textContent).toBe(
+      "| 1 | Panel |\n| 2 | Ready |",
+    );
+  });
+
   it("keeps source-image placement while showing persisted OCR and caption evidence", () => {
     render(
       <PostBody
diff --git a/frontend/src/PostBody.tsx b/frontend/src/PostBody.tsx
index 6769d0192..704324ec9 100644
--- a/frontend/src/PostBody.tsx
+++ b/frontend/src/PostBody.tsx
@@ -4,14 +4,16 @@ import type { PostContentUnit, PostImageContent } from "./api";
 import type { ReactNode } from "react";
 
 function parsePipeDelimitedTable(text: string): string[][] | null {
-  const rows = text
+  const parsedRows = text
     .split(/\r?\n/)
     .map((row) => {
-      const cells = row.split("|").map((cell) => cell.trim());
+      const cells = row.split(/(?<!\\)\|/).map((cell) => cell.trim().replace(/\\\|/g, "|"));
       if (cells[0] === "") cells.shift();
       if (cells[cells.length - 1] === "") cells.pop();
       return cells;
-    })
+    });
+  if (!parsedRows.some((row) => row.every((cell) => /^:?-{3,}:?$/.test(cell)))) return null;
+  const rows = parsedRows
     .filter((row) => !row.every((cell) => /^:?-{3,}:?$/.test(cell)))
     .filter((row) => row.length > 1 && row.some(Boolean));
   if (rows.length < 2 || rows.some((row) => row.length !== rows[0].length)) return null;
@@ -22,10 +24,20 @@ function parsePipeDelimitedTable(text: string): string[][] | null {
 function renderImageText(text: string) {
   const rows = parsePipeDelimitedTable(text);
   if (!rows) return <p>{text}</p>;
+  const [header, ...bodyRows] = rows;
   return (
     <table className="post-body-table post-image-text-table">
+      <thead>
+        <tr>
+          {header.map((cell, cellIndex) => (
+            <th key={`post-image-text-header-${cellIndex}`} scope="col">
+              {cell}
+            </th>
+          ))}
+        </tr>
+      </thead>
       <tbody>
-        {rows.map((row, rowIndex) => (
+        {bodyRows.map((row, rowIndex) => (
           <tr key={`post-image-text-row-${rowIndex}`}>
             {row.map((cell, cellIndex) => (
               <td key={`post-image-text-cell-${rowIndex}-${cellIndex}`}>{cell}</td>
@@ -72,7 +84,14 @@ function renderImageEvidence(
           <ol>
             {imageContent.regions.map((region) => (
               <li key={region.region_index}>
-                <span>{region.caption || region.extracted_text || t("Unknown")}</span>
+                {region.caption ? <p>{region.caption}</p> : null}
+                {region.extracted_text ? (
+                  <div className="post-image-region-text">
+                    {renderImageText(region.extracted_text)}
+                  </div>
+                ) : region.caption ? null : (
+                  t("Unknown")
+                )}
                 {region.tags.length ? (
                   <small>
                     {t("Image tags")}: {region.tags.join(", ")}