Bug description: Using the latest nightliy MK 81 I notice a heavy battery drain due to having Bluetooth active. With MIUI I was able to use the phone in mostly standby for four days, MK is only able to last ~30 hours. Bluetooth is listed as the app with most heavy battery usage and further analysis show that hal_bluetooth_lock was responsible for over 2500 wake locks with a total cpu time of over 3 hours.
Affected version: MK 81 Nightlys
Steps to replicate: Install OS, activate Bluetooth because you have a Smartwatch and keep it active.
Pinging the maintainer @GuaiYiHu
If I can help you resolve this bug, please let me know