No problem, but updating a forum takes a lot of time (I needed about 10 hours to prepare and test the various custom changes in the new release) and then another 3 hours updating (mostly waiting for the search index to be updated). The whole process is nerve wrecking and I don’t want to do this too often…
Your comment remembered me of something, I forgot about this customization. Will change asap.
The online timeout is 300 seconds, or 5 minutes.
Well, do you want a new monitor? Then this is a good time perhaps 
Seriously, is this a problem? As you say, when you login the forum switches to the theme configured in your profile page…