diff --git a/packages/ui/src/components/session/sidebar/hooks/useStickyProjectHeaders.ts b/packages/ui/src/components/session/sidebar/hooks/useStickyProjectHeaders.ts
index e3bfe0e7..5e4d6e39 100644
--- a/packages/ui/src/components/session/sidebar/hooks/useStickyProjectHeaders.ts
+++ b/packages/ui/src/components/session/sidebar/hooks/useStickyProjectHeaders.ts
@@ -11,6 +11,14 @@ export const useStickyProjectHeaders = (args: Args): Set<string> => {
   const { enabled = true, isDesktopShellRuntime, projectSections, projectHeaderSentinelRefs } = args;
   const [stuckProjectHeaders, setStuckProjectHeaders] = React.useState<Set<string>>(new Set());
 
+  React.useEffect(() => {
+    if (enabled && isDesktopShellRuntime) {
+      return;
+    }
+
+    setStuckProjectHeaders((prev) => (prev.size === 0 ? prev : new Set()));
+  }, [enabled, isDesktopShellRuntime]);
+
   React.useEffect(() => {
     if (!enabled || !isDesktopShellRuntime) {
       return;