Done!

mbetterclient/core/match_timer.py

@@ -427,6 +427,11 @@ class MatchTimerComponent(ThreadedComponent):
 
                     self.message_bus.publish(start_intro_message)
 
+                    # Set the pending match for timer expiration
+                    with self._timer_lock:
+                        self.pending_match_id = target_match.id
+                        self.current_fixture_id = fixture_id
+
                     return {
                         "fixture_id": fixture_id,
                         "match_id": target_match.id,