diff --git a/panel/io/state.py b/panel/io/state.py
index a884d98c52..81b4772de3 100644
--- a/panel/io/state.py
+++ b/panel/io/state.py
@@ -278,8 +278,9 @@ def _unblocked(self, doc: Document) -> bool:
         3. The application has fully loaded and the Websocket is open.
         """
         return (
-            doc is self.curdoc and self._thread_id in (self._current_thread, None) and
-            (not doc or not doc.session_context or self._loaded.get(doc))
+            doc is self.curdoc and
+            self._thread_id in (self._current_thread, None) and
+            (not (doc and doc.session_context and doc.session_context.session) or self._loaded.get(doc))
         )
 
     @param.depends('_busy_counter', watch=True)