diff --git a/app.py b/app.py
index 4732e30..fdd505f 100644
--- a/app.py
+++ b/app.py
@@ -59,9 +59,19 @@ class Config:
 # ============================================================
 
 log_level = logging.DEBUG if os.getenv("DEBUG", "false").lower() == "true" else logging.INFO
-logging.basicConfig(level=log_level)
 
+logging.basicConfig(
+    level=log_level,
+    format="%(message)s" 
+)
+
+# 🔇 HTTP Noise entfernen
 logging.getLogger("werkzeug").setLevel(logging.ERROR)
+logging.getLogger("urllib3").setLevel(logging.WARNING)
+
+# 🔇 Gunicorn Access Logs entfernen
+logging.getLogger("gunicorn.access").setLevel(logging.WARNING)
+
 logger = logging.getLogger("matrix-interceptor")
 
 def now_iso():
@@ -73,7 +83,7 @@ def log_event(event: str, **kwargs):
     logger.info(f"{base} {details}")
 
 def debug_log(title, data):
-    if config.debug:
+    if os.getenv("DEBUG", "false").lower() == "true":
         logger.debug(f"{title}: {json.dumps(data, default=str)}")
 
 # ============================================================
@@ -96,7 +106,7 @@ RATE_LIMIT = defaultdict(list)
 METRICS = defaultdict(int)
 
 CACHE_FILE = "/app/cache/known_users.json"
-CACHE_DIRTY = False
+CACHE_DIRTY = True
 
 # ============================================================
 # CACHE HANDLING
@@ -382,19 +392,32 @@ def invite(room_id, event_id):
 
     if domain in config.domain_whitelist:
         remember_user(sender)
-        return forward_request(
+        METRICS["invite_allowed"] += 1
+        return forward_request(...)
             "PUT",
             f"{config.tuwunel_url}/_matrix/federation/v2/invite/{room_id}/{event_id}",
             request.headers,
             payload
         )
 
-    if config.block_external_dms and is_external(sender):
+    is_dm = is_likely_dm_event(event)
+
+    if config.block_external_dms and is_dm and is_external(sender):
 
         if not is_known_user(sender):
 
+            # 🔥 fallback fix
             if is_user_in_local_rooms(sender):
                 remember_user(sender)
+                METRICS["invite_allowed"] += 1
+                
+                return forward_request(
+                    "PUT",
+                    f"{config.tuwunel_url}/_matrix/federation/v2/invite/{room_id}/{event_id}",
+                    request.headers,
+                    payload
+                )
+
             else:
                 METRICS["invite_blocked"] += 1
                 log_event(