The browser tab is blank, and unless I’m doing something wrong there is no Favicon set for Lemmy.World. I would hazard a guess that most of us have lots and lots of tabs open at any given time. Would it be possible to add an icon to help make it easier to locate lemmy.world tabs?
I suspect you have it cached and it was of a proper size before, hence your cache supplies a usable size. While the current version on the server is way too big and hence does not get rendered if loaded.