As said, I contacted Jolla support a week ago, no reply. According to my Jolla account, the device registered fine - it’s the same model, new IMEI appears in the account and shows as activated.
I have been a Jolla/Sailfish user since 2015, but this is starting to be too frustrating. I really like Saiflish, but lately, it’s caused too much trouble. I had several unresovled issues on my 2nd phone, and now this. Plus no reply from support for a week is simply not acceptable nowadays.
Today, I installed LineageOS on this phone. Maybe it’s time to walk away from a sinking ship.