Watch bond removed/overwritten

[liamcharger]

When pairing a watch with an encrypted connection (you can use an ANCS build to create one), the watch often deletes/overwrites the bond it has with my iPhone.

Let's say I pair my watch (without a previous bond) with all the persisted data removed from InfiniLink. When I connect, iOS will ask for the passkey to be inputted. I enter the passkey, and a bond is created. The next time the watch disconnects/reconnects, I get an error saying "There was an error connecting to the peripheral because the bond has been removed." To fix this, I have to delete the bond iOS saved, and pair again using the code.

This behavior is pretty unpredictable--sometimes it happens, sometimes it doesn't. And it's not an issue with InfiniLink; all the pairing stuff is handled by iOS.

I'm not sure if it has something to do with the ANCS implementation, but I don't recall it happening when just encrypting the battery characteristic, although I could be wrong.

Can anyone using iOS reproduce this?

[mark9064]

Might just be my phone but it never seems to be bonded according to NRF connect (android), I can bond it manually but some time later it is unbonded again (I have not yet debugged the trigger of the unbonding). So I think there might be some weird behaviour happening