diff --git a/plugins/platforms/zulip/adapter.py b/plugins/platforms/zulip/adapter.py
index 7e48173..1937f8f 100644
--- a/plugins/platforms/zulip/adapter.py
+++ b/plugins/platforms/zulip/adapter.py
@@ -449,6 +449,10 @@ class ZulipAdapter(BasePlatformAdapter):
                             except Exception:
                                 pass
 
+                # Clear stale errors on successful poll cycle
+                self._health_stats["last_error_msg"] = None
+                self._health_stats["last_error_at"] = None
+
                 # Gen 4: Heartbeat logging — prove poll loop is alive
                 now = time.time()
                 if now - self._last_heartbeat_time > HEARTBEAT_INTERVAL: