improve disconnect logic a bit

pomice/player.py

@@ -150,7 +150,7 @@ class Player(VoiceProtocol):
         self._voice_state.update({"sessionId": data.get("session_id")})
 
         if not (channel_id := data.get("channel_id")):
-            self.channel = None
+            await self.disconnect()
             self._voice_state.clear()
             return
 
@@ -199,10 +199,13 @@ class Player(VoiceProtocol):
 
     async def disconnect(self, *, force: bool = False):
         await self.stop()
+
+        try:
             await self.guild.change_voice_state(channel=None)
+        finally:
+            self._is_connected = False
             self.cleanup()
             self.channel = None
-        self._is_connected = False
             del self._node._players[self.guild.id]
 
     async def destroy(self):