Main microphone, sometimes is working, sometimes is not.

Hello ! The main micphone sometimes will work, sometimes will just stop to work, this happens in calls. After I call back the main microphone will work again. Recorder will not record my voive, google assistant will not detect my voice .

When I record a video, only the top microphone will record.
Any ideea if it's a hardware or software problem ? I tried everything on google and didn't help. Thank you