Denon Heos groups - issue

Since the latest updates on bOS and Denon HEOS there seems to be an issue with forming/keeping groups of speakers.

The Denon node did work as expected, but since the update it tries to control the group. But by doing so it disassembles the existing group, or (if the group’s not there yet) will fail to combine the speakers into a group.

Anyone experiencing the same behavior?

By the way:

Denon is having another problem, it’s losing its favorites all the time. I’ve contacted Denon support for that.