TL;DR: in the “When page is loaded” event, add “show group focus” and then “hide group focus”
first of all, I’m not a bubble expert or anything, I used bubble for a month or two and have been dealing with a slow group focus (probably because it contains a lot of different searches). I noticed that it was slow only the first time it was opened, but it became instant afterward. So I tried to put “show group focus” and then “hide group focus” in the “when page is loaded” event and it is now also instant on the first time it opens. I think because now those searches are already triggered when the page loads.
Hope this can help someone who is facing the same problem that I had.