Why does the speaker under my Xiaomi 3 suddenly have no sound, and it will be fine after a while?

This may be caused by an application software conflict. Please back up the important data (contacts, text messages) in your mobile phone. Notes, etc. ), and then open Settings ~ Backup Reset ~ Restore factory settings. Try again and see if this phenomenon still exists.

If there is no such phenomenon, the application you downloaded should be in conflict. I suggest you check it carefully.