What scenario would cause an Android phone to lose mobile data connection to the Internet when joining an online meeting? Eventually after disconnecting and connecting several times, the phone loses all Internet access through the mobile data for several minutes. It is almost as if a temporary block is put on the phone's Internet by the carrier. So no applications can access the Internet using mobile data. Cellular coverage if 5G with 4 bars. Online meetings work fine using a desktop connection. Build number is 8930.

I have also tried other online STUN and TURN servers. But this did not resolve the problem.