Tue, Jan 28
It hasn't worked for the Spanish Wikipedia's CopyPatrol since the 4th of January, it seems. Same with the French version.
Jan 3 2019
Another complaint about this account at https://meta.wikimedia.org/wiki/Talk:Steward_requests/Permissions#Strange_administrator_wikiquote:de:user:Missbrauchsfilter
Dec 10 2018
Nov 30 2018
Nov 27 2018
I believe this should be handled by a meta RfC rather than discussion at the enwiki Village Pump and a Phab ticket. (Unless, of course, the WMF wants to act on it immediately as a security issue)