@fakeshell: I sent a PM to you in this forum software – did that work (there seems to be no outgoing mailbox where I can check)? Are there any news on this topic?
Update: @fakeshell debugged this yesterday remotely on my phone and found the problem, fixed it and provided an update which is already available via apt upgrade. Works now for me (Germany, Vodafone). Thanks a lot!
I guess the upgrade is only via special repos because apt update does not show anything new. But if it is difficult now, the monthly release will have it, as Wayne told me today.