I have bought a new phone for my wife however we are experiencing a big problem. I bought the samsung A72 on the 18th of Sep 2021 in Switzerland, Geneva. The problem: Every time we do a video call either via messenger app or viber app, the other people do not hear us well. The sound has some "gaps". This only happens when the microphone is used in loundspeaker mode e.g. when doing a video call using messenger app but does not happen when we speak on a regular cell call. I read online other people have the same issue. Is this a known issue? We have tried to re-install the apps and to reboot but no luck.