There was some recent updates to it that went to beta a while ago
I had meant to have a look at it to test it out but maybe that could be it?
One thing I’ve noticed that this new “See also” feature seems like it just nearly references almost every other joseki position
Like even at this point, it seems like there’s about 19000 things in the list (at least counting the children of the div that contains them)
So maybe something about that is slowing the whole thing down. It does seem like if you click a few of the “see also”'s in a row the page loading grinds to a halt.