On http://en.wikipedia.beta.wmflabs.org/wiki/Talk:ET5 (and on testwiki or cawiki) click on Mention and the action will never be finished. The Mention box is stuck.
Caused by a regression in VE: https://gerrit.wikimedia.org/r/#/c/226727/ . Probably because we have a UserCache that extends LinkCache and we need to update it for the LinkCache changes.
Who's supposed to work on this? Could an assignee be set please?
Sorry, this was fixed in https://gerrit.wikimedia.org/r/227590 but I tagged it against the wrong bug.