My Home doesn't navigate to launchpad if that's where it came from

A mitigation for the issue in #98122

client/landing/stepper/declarative-flow/internals/steps-repository/launchpad/index.tsx

@@ -76,7 +76,8 @@ const Launchpad: Step = ( { navigation, flow }: LaunchpadProps ) => {
 
 	function redirectToSiteHome( siteSlug: string | null, flow: string | null ) {
 		recordTracksEvent( 'calypso_launchpad_redirect_to_home', { flow: flow } );
-		window.location.replace( `/home/${ siteSlug }` );
+		// Query param is a guard to prevent infinite loops (#98122)
+		window.location.replace( `/home/${ siteSlug }?from=full-launchpad` );
 	}
 
 	useEffect( () => {

client/my-sites/customer-home/controller.jsx

@@ -3,6 +3,7 @@ import { fetchLaunchpad } from '@automattic/data-stores';
 import { areLaunchpadTasksCompleted } from 'calypso/landing/stepper/declarative-flow/internals/steps-repository/launchpad/task-helper';
 import { isRemovedFlow } from 'calypso/landing/stepper/utils/flow-redirect-handler';
 import { getQueryArgs } from 'calypso/lib/query-args';
+import { bumpStat } from 'calypso/state/analytics/actions';
 import { fetchModuleList } from 'calypso/state/jetpack/modules/actions';
 import { fetchSitePlugins } from 'calypso/state/plugins/installed/actions';
 import { getPluginOnSite } from 'calypso/state/plugins/installed/selectors';
@@ -40,7 +41,7 @@ export async function maybeRedirect( context, next ) {
 		return;
 	}
 
-	const { verified, courseSlug } = getQueryArgs() || {};
+	const { verified, courseSlug, from } = getQueryArgs() || {};
 
 	// The courseSlug is to display pages with onboarding videos for learning,
 	// so we should not redirect the page to launchpad.
@@ -75,11 +76,16 @@ export async function maybeRedirect( context, next ) {
 			launchpadScreenOption === 'full' &&
 			! areLaunchpadTasksCompleted( launchpadChecklist, isSiteLaunched )
 		) {
-			// The new stepper launchpad onboarding flow isn't registered within the "page"
-			// client-side router, so page.redirect won't work. We need to use the
-			// traditional window.location Web API.
-			redirectToLaunchpad( slug, siteIntentOption, verified );
-			return;
+			if ( from === 'full-launchpad' ) {
+				// A guard to prevent infinite loops (#98122)
+				context.store.dispatch( bumpStat( 'calypso_customer_home_launchpad_infinite_loop_guard' ) );
+			} else {
+				// The new stepper launchpad onboarding flow isn't registered within the "page"
+				// client-side router, so page.redirect won't work. We need to use the
+				// traditional window.location Web API.
+				redirectToLaunchpad( slug, siteIntentOption, verified );
+				return;
+			}
 		}
 	} catch ( error ) {}