services: fix TTS websocket services disconnections

Fixes #1467

src/pipecat/services/playht/tts.py

@@ -169,7 +169,7 @@ class PlayHTTTSService(InterruptibleTTSService):
 
     async def _connect_websocket(self):
         try:
-            if self._websocket:
+            if self._websocket and self._websocket.open:
                 return
 
             logger.debug("Connecting to PlayHT")
@@ -197,11 +197,11 @@ class PlayHTTTSService(InterruptibleTTSService):
             if self._websocket:
                 logger.debug("Disconnecting from PlayHT")
                 await self._websocket.close()
-                self._websocket = None
-
-            self._request_id = None
         except Exception as e:
             logger.error(f"{self} error closing websocket: {e}")
+        finally:
+            self._request_id = None
+            self._websocket = None
 
     async def _get_websocket_url(self):
         async with aiohttp.ClientSession() as session: