diff --git a/.changeset/grumpy-lamps-study.md b/.changeset/grumpy-lamps-study.md
new file mode 100644
index 00000000000..e42cd0b0f91
--- /dev/null
+++ b/.changeset/grumpy-lamps-study.md
@@ -0,0 +1,8 @@
+---
+'@clerk/clerk-js': patch
+'@clerk/types': patch
+---
+
+Fixes stale `SignIn` object on `authenticateWithRedirect` for `saml` and `enterprise_sso` custom flows
+
+Previously, the same connection identifier would be used on every `authenticateWithRedirect` call leading to redirecting to the wrong identity provider
diff --git a/packages/clerk-js/src/core/resources/SignIn.ts b/packages/clerk-js/src/core/resources/SignIn.ts
index cf39bbab220..e53e5bd07f2 100644
--- a/packages/clerk-js/src/core/resources/SignIn.ts
+++ b/packages/clerk-js/src/core/resources/SignIn.ts
@@ -231,25 +231,27 @@ export class SignIn extends BaseResource implements SignInResource {
     params: AuthenticateWithRedirectParams,
     navigateCallback: (url: URL | string) => void,
   ): Promise<void> => {
-    const { strategy, redirectUrl, redirectUrlComplete, identifier, oidcPrompt } = params || {};
-
-    const { firstFactorVerification } =
-      (strategy === 'saml' || strategy === 'enterprise_sso') && this.id
-        ? await this.prepareFirstFactor({
-            strategy,
-            redirectUrl: SignIn.clerk.buildUrlWithAuth(redirectUrl),
-            actionCompleteRedirectUrl: redirectUrlComplete,
-            oidcPrompt,
-          })
-        : await this.create({
-            strategy,
-            identifier,
-            redirectUrl: SignIn.clerk.buildUrlWithAuth(redirectUrl),
-            actionCompleteRedirectUrl: redirectUrlComplete,
-            oidcPrompt,
-          });
-
-    const { status, externalVerificationRedirectURL } = firstFactorVerification;
+    const { strategy, redirectUrl, redirectUrlComplete, identifier, oidcPrompt, continueSignIn } = params || {};
+
+    if (!this.id || !continueSignIn) {
+      await this.create({
+        strategy,
+        identifier,
+        redirectUrl: SignIn.clerk.buildUrlWithAuth(redirectUrl),
+        actionCompleteRedirectUrl: redirectUrlComplete,
+      });
+    }
+
+    if (strategy === 'saml' || strategy === 'enterprise_sso') {
+      await this.prepareFirstFactor({
+        strategy,
+        redirectUrl: SignIn.clerk.buildUrlWithAuth(redirectUrl),
+        actionCompleteRedirectUrl: redirectUrlComplete,
+        oidcPrompt,
+      });
+    }
+
+    const { status, externalVerificationRedirectURL } = this.firstFactorVerification;
 
     if (status === 'unverified' && externalVerificationRedirectURL) {
       navigateCallback(externalVerificationRedirectURL);
diff --git a/packages/clerk-js/src/ui/components/SignIn/SignInStart.tsx b/packages/clerk-js/src/ui/components/SignIn/SignInStart.tsx
index 7a69de6312d..ebd91c4836b 100644
--- a/packages/clerk-js/src/ui/components/SignIn/SignInStart.tsx
+++ b/packages/clerk-js/src/ui/components/SignIn/SignInStart.tsx
@@ -405,6 +405,7 @@ function SignInStartInternal(): JSX.Element {
       redirectUrl,
       redirectUrlComplete,
       oidcPrompt: ctx.oidcPrompt,
+      continueSignIn: true,
     });
   };
 
diff --git a/packages/clerk-js/src/ui/components/SignIn/__tests__/SignInStart.test.tsx b/packages/clerk-js/src/ui/components/SignIn/__tests__/SignInStart.test.tsx
index 868da61eddc..85cb044bbee 100644
--- a/packages/clerk-js/src/ui/components/SignIn/__tests__/SignInStart.test.tsx
+++ b/packages/clerk-js/src/ui/components/SignIn/__tests__/SignInStart.test.tsx
@@ -291,6 +291,7 @@ describe('SignInStart', () => {
         strategy: 'enterprise_sso',
         redirectUrl: 'http://localhost/#/sso-callback',
         redirectUrlComplete: '/',
+        continueSignIn: true,
       });
     });
   });
@@ -314,6 +315,7 @@ describe('SignInStart', () => {
         strategy: 'enterprise_sso',
         redirectUrl: 'http://localhost/#/sso-callback',
         redirectUrlComplete: '/',
+        continueSignIn: true,
       });
     });
   });
diff --git a/packages/types/src/redirects.ts b/packages/types/src/redirects.ts
index a960e7e40fd..2418931b5bf 100644
--- a/packages/types/src/redirects.ts
+++ b/packages/types/src/redirects.ts
@@ -61,6 +61,11 @@ export type AuthenticateWithRedirectParams = {
    */
   continueSignUp?: boolean;
 
+  /**
+   * Whether to continue existing SignIn (if present) or create a new SignIn.
+   */
+  continueSignIn?: boolean;
+
   /**
    * One of the supported OAuth providers you can use to authenticate with, eg 'oauth_google'.
    * Alternatively `saml` or `enterprise_sso`, to authenticate with Enterprise SSO.