I’ve install jitsi on my Synology NAS via Docker following this procedure : https://jitsi.github.io/handbook/docs/devops-guide/devops-guide-docker.
If I connect to a meeting via my PC + my phone (on Wifi, via Firefox or Chrome), I can see both webcam images from PC and phone. But I switch my phone internet connection to 4G, then, neither sound nor image is sent nor received from/to the phone. If I stay in 4G but connect in VPN, then it works fine again.
I tried disabling the Synology firewall, plus the one of my internet box and placing the Synology in a DMZ, but still the same.
Any idea ?