We tested it with two iPhones and one iPad set with IOS 14 and 15.
BBB was installed on each of the seven servers and tested by connecting to all of them.
This problem did not occur on PC or Android, but in IOS, the other person's sound becomes very small when operating the microphone.
In the case of IOS 15, it was also found that the microphone connection became unstable when the participant entered while the presenter was operating the screen sharing function.
In the case of the image below, even though the presenter did not share the screen, the connection that occurs when the microphone is turned on becomes unstable (IOS 15).
Perhaps it is assumed that a problem occurs if the participant enters while the speaker continues to deliver the voice through the microphone.
This is because when the participant's microphone is turned off, the speaker's voice returns to normal.
If you look at other posts, safari on MacOS often seems to have problems, so I'd appreciate it if you could tell me how to solve these problems with Apple devices.