Guest not able to see camera feed and new joining users

Hi, I’m having the following issue:

User A Joins
User B Joins
User C Joins

User A does see User B but doesn’t get any video feed and doesn’t hear him
User B sees everyone
For User A, There is only user B in the call
User C sees everyone. Same for all following users

Sometimes, user B sees user A twice.

Our specifications:
We are using the Docker Setup with our own STUN server which is enabled in the .env file
jwt authentification is enabled.
p2p is disabled in config.js and also set to false but webRTC still shows is as active
Our iceTransportPolicy set to relay
use STUN is set to our own STUN server in config.js

Version: latest docker stable 6865

Any help would be much appriciated