Update 8901.4.A.0016.6: Bluetooth control broken on various devices

[urs_lesse]

Had to hunt a bit, but found it:

Everytime the FP earbuds connect, the phone calls the most recent number that was called

On my girlfriends FP4, everytime the FP earbuds connect, the phone calls the most recent number that was called. Currently she calls her own number before she uses the Fairphone wireless earbuds to not disturb other people. Has anybody experienced this strange behavior, too? Are there any solutions?