Bluetooth problems on Z2

[Vinulya13]

I have a problem with Bluetooth. I usually use stamina mode. When I off Bluetooth, it's automatically switch on after some time. It's annoying to switch off it again. It happens many time per day. How to solve this problem? Please maybe someone knows it?

[Phy]

Do you experience the same while on safe mode?

How to boot on safe mode
http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008

How to boot on safe mode on Lolipop
1. press and hold the power key
2. once you get the pop up menu 
3. press and hold "power off" 
4. Boot on safe mode should become available