Haven’t heard the static on latest grapheneos with A2DP hardware offload disabled on my P9P. Need to reenable A2DP to see if it comes back.

Perhaps you had the pre-fork android app?

Software festure, but I miss being able to turn on and off wifi and Bluetooth in the drop-down menu with one click. Latest android replaced it with another sub menu to select network or device, requiring another action to enable/disable.