You don't happen to know if anything else weird happened with that bug, do you? Was it on web or desktop? I ask because I was unable to replicate the problem. When you got locked in, were you able to converse with grandma and get it unlocked?
(I'll note that I haven't run the Linux build myself, so if that's the one you mean I'll probably need to reach out you or to another tester with something Unix-based to ask)
