Maybe this will fix

thin_client.py

@@ -32,18 +32,6 @@ intents.moderation = True
 # on_member_ban - wyswietl na glownym kanale pieczatke "Niech spierdala"
 # on_member_unban - "mam wyjebane"
 
-logger = logging.getLogger("discord")
-logger.setLevel(logging.DEBUG)
-handler = handlers.RotatingFileHandler(
-    filename=LOGFILE,
-    encoding=ENCODING,
-    mode="a",
-    maxBytes=6 * 1024 * 1024,
-    backupCount=6,
-)
-formatter = logging.Formatter("%(asctime)s - %(name)s - %(levelname)s - %(message)s")
-handler.setFormatter(formatter)
-logger.addHandler(handler)
 random.seed()
 client = commands.Bot(intents=intents, command_prefix="$")
 
@@ -52,6 +40,8 @@ client = commands.Bot(intents=intents, command_prefix="$")
 @client.event
 async def on_ready():
     """Metoda wywoływana przy połączeniu do serwera."""
+    logger = logging.getLogger("discord")
+
     logger.debug("%s has connected to Discord!", client.user)
     # TODO: load vs reload
     logger.info("Reactor: online")
@@ -80,6 +70,19 @@ async def on_ready():
 
 # *================================== Run
 if __name__ == "__main__":
+    logger = logging.getLogger("discord")
+    logger.setLevel(logging.DEBUG)
+    handler = handlers.RotatingFileHandler(
+    filename=LOGFILE,
+    encoding=ENCODING,
+    mode="a",
+    maxBytes=6 * 1024 * 1024,
+    backupCount=6,
+    )
+    formatter = logging.Formatter("%(asctime)s - %(name)s - %(levelname)s - %(message)s")
+    handler.setFormatter(formatter)
+    logger.addHandler(handler)
+
     logger.info("Starting discord bot")
     threads = []
     logger.info("Starting discord bot: Creating threads")