Android 12 speakerphone issue

[chapap]

I have recently updated to Android 12 using the firmware file from asus' website, everything seems to be working fine other than the speakerphone which suffers from a serious echo problem. People complain about hearing themselves whenever I use the speakerphone. I tried recording a call and could hear the echo in the recording as well. If I switch back from speakerphone to normal then the echo is gone.
I have downgraded back to android 11 and it does not have this issue, so I assume it's a firmware bug.

[jonassenjens]

I got my phone today and I have this issue as well, can't use speakerphone. Extremely annoying. Do in y'all think this will/can be fixed? @CH_ASUS

[dron39]

@jonassenjens
It seems like HW issue. I would recommend you to contact authorized repair center or ASUS technical support first.
At least in my case, but I guess it's the same. What MFD (written on the box) by the way?

[jonassenjens]

@Dron@Dron@dron39
Alright I will do that, thank you.
Mfd: 2021.08