Dear Ben,
Am 30.12.18 um 19:19 schrieb Ben Hutchings:
Control: reassign -1 udev Control: forcemerge 917124 -1
Thank you for taking care of the issue. […]
Yes, it sounds like this really is the same thing although it was harder for you to recover from.
For the record, in hindsight adding the symbolic link would have been enough.
/dev/mapper$ sudo ln -s ../dm-0 sda3_crypt Kind regards, Paul