[Docker] Teamspeak server no longer accessible after a few minutes

Hi,
I’m trying to set up a Teamspeak server on my Synology DS720+ NAS.
I am using Docker for this.

I used these instructions: h**ps://alxtech.de/synology-teamspeak-via-docker-installieren/

I have also opened the ports on my Fritz.Box.

The server starts, I have been recognized as admin and I can access the server locally, edit etc. and I can also connect from outside and do everything. I tested this with the Teamspeak app on my cell phone without a WLAN connection.

After a few minutes, the server is no longer accessible. I find the following in the logs:

2024-10-11 08:22:42.815518|ERROR   |              |   |TS3ANetwork::ResolveHostName failed error: -3 (Try again) 11

If I then stop the container and start it again, everything works again for a few minutes…until the error occurs again.

What can I do?

Greetings taker-`