On an Iphone (IOS15), We cannot hear others using the Wechat and Safria browsers

Local and remote microphones and cameras are working fine. I can be heard remotely, but I (IOS15) can’t hear the other person.
Occasionally, very rarely, I can hear it. Infinitesimal case.

I tried VP8, VP9, and 264, all with the same result.

This was only available in recent versions of Docker, but I found that going back to previous versions, there was no sound either. So I feel like it’s IOS. Ask the Jitsi if there is a way around this problem

We have similiar issue, users from desktop can be heard, but not from iphones with iOS 15.