USB ports Malfunctions once in a while.
AMD announces issue with 500 series motherboards.
Articles related on this issue:
You need to go to the BIOS to do this.
- Set PCIe x16 slot to Gen 3
- make sure Above 4G Decoding is disabled
- Disable resize BAR
- Finally, disable Global C-State Control under Peripherals->CPU Common Options
That should make USB devices (Onboard Bluetooth is on the USB controller) more stable.