[BUG] Tabs not opening in the right place in the sidebar view with filters.

[user0022]

Hello! I use Firefox ESR 115, under Lubuntu 22.04 OS.

In sidebar view, I noticed that if I do for instance a filtering with grass (for GrassHopper), and that from one of the tabs it shows after that (the tab is https://github.com/madprops/grasshopper/issues in this case), I open a link in a new tab, it sometimes opens placed a few tabs above (maybe could also be below) in the list, instead of being in the immediate following (so then below) tab. Yet in the Firefox tab bar, I see that it opens where it is supposed to (right after the tab which it comes from). If I erase grass, to be back in an list with no filter, tabs open again in the right place.

Maybe difficult to reproduce because it seems like it only happens on some tabs, of which I don't know why they have this problem and others not.

I tried the same from the same tab but with another fitlering, Filter Loaded, which I put as a button in Favorites panel, and the problem didn't show with the tab that sent links above. But continuing in this filter, I opened another tab (https://github.com/madprops/grasshopper/discussions), and from it I opened https://github.com/madprops/grasshopper/discussions/83, and again, in GH sidebar it opened it right above instead of below (but still in the correct place in FF tab bar).