I'd say flat battery (it works out as correct most of the time) except you said it can be fixed by disabling the speaker. What Bluetooth stack (windows, toshiba or bluesoleil) are you using?
OS: Windows 10 64 bit Professional
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
