IOS/Android - Can't connect with mobile app from phone with two sim cards

Mobile App version 20.6.0 build 101

When trying to connect to on-premise Jitsi installation and to from a phone (iOS and Android) with two sim cards (two numbers, two Internet connections) application does not establish a video/audio connection. It tries to connect for 30s then hangs up.

On same configuration (phone with two sim cards) web-based application works good.

After turning on wifi connection mobile app works OK.
Switching off one of the sim cards resolves the problem, mobile app works OK.

I have tested this issue on multiple iPhones and Android-based phones. Every time it doesn’t work.