Hi @alexnilsson,
Narrowing this down a bit further; a single device enrolled 15th February was fine (assuming this device was not reset). So, between 15th February and 18th February this appears to have fallen over.
I would be than happy to share the device links, but I am sure the Meraki Support Team would be fully aware of the changes taking place. Quote this post and ask them to PM if required.
Whilst I appreciate this will be causing frustration, our business case does not use this feature; we do not allow people to put Apple ID's on to the devices. Whilst I agree this is a bug and should be fixed, it would very improper of me to raise a case as it is not causing me an issue.
But we are a community and others here might not be aware of this bug and be very grateful you have raised this publicly. Hopefully they can get it fixed soon!