Can't check 'Phone Audio' setting for a Bluetooth headset Somehow, suddenly I can't hear phone calls with my Bluetooth headset - I don't know what happened.

I tried to check the Phone Audio option under the device's 'Use for' settings, but it is impossible! It can't be checked.
I found this fix/workaround: Go to Settings, then Bluetooth. Turn off the Bluetooth and the screen should show a link for the scanner settings. Click the link to turn off "Bluetooth scanning." Then it works...

I copied it from here: https://forums.lenovo.com/t5/forums/v3_1/forumtopicpage/board-id/MotoG4thGen/thread-id/16482/page/4