Thank you I will try that
In the meantime I tried another system-update, setiing `base-files` and `snapd` on hold first. After a reboot and a cold-start I can confirm it went well and there are complaints whatsoever. So it seems to be **very** certain that either of the two aforementioned packages **has to be** the cuplrit.
Well done. I think you should wait a bit longer now, see if any bug info about base-files or snapd appears.
Then if nothing appears, backup and try updating base-files
Regards
Neville