diff --git a/app.py b/app.py
index f33bc0a..f70ec9e 100644
--- a/app.py
+++ b/app.py
@@ -68,7 +68,6 @@ logging.getLogger("urllib3").setLevel(logging.WARNING)
 logging.getLogger("gunicorn.access").setLevel(logging.WARNING)
 
 logger = logging.getLogger("matrix-interceptor")
-logger.propagate = False
 
 def now_iso():
     return datetime.now(timezone.utc).isoformat()
@@ -245,7 +244,7 @@ def seed_known_users():
 def periodic_seed():
     while True:
         seed_known_users()
-        time.sleep(300)
+        time.sleep(60)
 
 # ============================================================
 # FALLBACK
@@ -281,6 +280,21 @@ def is_user_in_local_rooms(user_id):
         logger.error(f"Fallback check failed: {e}")
 
     return False
+    
+# ============================================================
+# FALLBACK RETRY (CRITICAL FOR CONSISTENCY)
+# ============================================================
+
+def fallback_check_with_retry(user_id):
+    """
+    Retry membership check to handle Matrix eventual consistency.
+    User join may not be immediately visible via API.
+    """
+    for _ in range(2):  # 🔥 2 attempts
+        if is_user_in_local_rooms(user_id):
+            return True
+        time.sleep(0.5)  # 🔥 short delay
+    return False
 
 # ============================================================
 # DM DETECTION
@@ -425,10 +439,12 @@ def invite(room_id, event_id):
 
         if not is_known_user(sender):
 
-            if is_user_in_local_rooms(sender):
+            if fallback_check_with_retry(sender):
                 remember_user(sender)
+
                 with METRICS_LOCK:
                     METRICS["invite_allowed"] += 1
+
                 return forward_request(
                     "PUT",
                     f"{config.tuwunel_url}/_matrix/federation/v2/invite/{room_id}/{event_id}",
@@ -448,17 +464,17 @@ def invite(room_id, event_id):
                 )
                 return Response(status=403)
 
-    remember_user(sender)
+        remember_user(sender)
 
-    with METRICS_LOCK:
+        with METRICS_LOCK:
         METRICS["invite_allowed"] += 1
 
-    return forward_request(
-        "PUT",
-        f"{config.tuwunel_url}/_matrix/federation/v2/invite/{room_id}/{event_id}",
-        request.headers,
-        payload
-    )
+        return forward_request(
+            "PUT",
+            f"{config.tuwunel_url}/_matrix/federation/v2/invite/{room_id}/{event_id}",
+            request.headers,
+            payload
+        )
 
 # ============================================================
 # FORWARD