voice messages

Hello, I have a problem with my mijia g1. After some time of usage the vacuum cleaner suddenly stopped to speak. I checked the app and everything is activated (voice button is on). The robot simply doesn’t speak. It speaks only if I change the volume, just to say that the volume was changed. I...

I've bought this smartphone yesterday and I immediately noticed that the volume of the microphone in voice messages is very low and it's like is muffled. I tried to use the recorder app or to make a video, and the sound is perfect there. So i figured that the problem is in voice messages...