Pauli,
This is interesting on Public Build 22621.1194. Still 2 versions of Client.Core.π€·ββοΈ
and on Beta:
Looks like the problem could be specific with .1010.
I had one machine upgraded directly from 25284 and had both 25284.1000 and 25295.1000 and it was not causing the bug.
Also, weird that on the error message in Event Viewer it shows an "!" at the end the name. π€·ββοΈ