Improving the stream & listening to it

Hi all,

We’ve narrowed our issues a bit down.
We have rooms with mostly a few streams, where people can subscribe to.
We did some tests with just showing the stream, after a while. The subscribers’ stream freezes without any reason. It’s not that every subscriber gets kicked out, because on another device the stream keeps running (but also until it breaks after a random amount of time).

The person can then click a button to rejoin (throw away the old connection and subscribe again). And it will work again for some time.

Do you guys have any ideas what could cause this issue?
We want the stream to stay on, unless the publisher is disabling the stream of course.

Here we have a few settings of our server;

"janus": "server_info",
   "transaction": "xoh7layuQbA",
   "name": "Janus WebRTC Server",
   "version": 1002,
   "version_string": "1.0.2",
   "author": "Meetecho s.r.l.",
   "commit-hash": "b63e422972d3f48e51d0c426eb69508342b64b04",
   "compile-time": "Tue May  3 08:33:36 UTC 2022",
   "log-to-stdout": true,
   "log-to-file": true,
   "log-path": "/opt/janus/log/janus.log",
   "data_channels": false,
   "accepting-new-sessions": true,
   "session-timeout": 60,
   "reclaim-session-timeout": 0,
   "candidates-timeout": 45,
   "server-name": "MyJanusInstance",
   "ipv6": false,
   "ice-lite": false,
   "ice-tcp": false,
   "ice-nomination": "aggressive",
   "ice-keepalive-conncheck": false,
   "full-trickle": false,
   "mdns-enabled": true,
   "min-nack-queue": 200,
   "nack-optimizations": false,
   "twcc-period": 200,
   "dtls-mtu": 1200,
   "static-event-loops": 0,
   "api_secret": false,
   "auth_token": false,
   "event_handlers": false,
   "opaqueid_in_api": false,

I dont know if any of these settings is too strict?