I understand, you can still use the BT devices, you can just not use the devices control buttons and you can still control the device with the Fairphone, correct? Thats annoying yes, in my eyes not unusable. Not everyone is hit by this bug, btw.
Funny off topic thought that come to my mind: when it was announced the FP4 would come without a headphone jack, reading the forum one could get the impression BT devices are only rarely used. now that BT is partially broken, reading in the forum gives the impression BT is the most important feature of a phone.
Back to the topic: reading this, I’m wondering what settings the broken devices use?