This seems to be a common issue where the sound only comes out of the earpiece speaker. The bottom firing speaker isn't on and when I try playing the audio on a connected audio bluetooth device, it still plays the audio on the earpiece speaker. After I restart the phone, it fixes itself but everytime someone calls me on facebook messenger, the issue comes back. I don't have apps on sleep and have maximum performance on my phones battery mode.
That is possible, as I still see in call volume slider in my volume menu right after the messenger call.i tried calling my phone through my sim and it works normally. Wondering if others have the same issue.