New Sidebar

Probably. I'll make a null edit. Let's hope that works.

Thank you. Now I have the correct sidebar again.

Similar also happens to me every now and then, when I suddenly see the MediaWiki default sidebar with Community portal and Current events. Is there already a bug on this?

There once was an issue in bugzilla that addressed this, but as there is no way to consistently reproduce this issue, the issue was closed, IIRC (rightly so).

One of the reasons to schedule operation cleanup *wink*