Yeah the blockers are awesome. Also having a few greasemonkey scripts to automate login on a few pages that require too many clicks.
Try clean install. Maybe extensions and userscripts are messing with you.
I've tried a few times and tried FF beta but no difference.
I have the same issue quite frequently... If I knew any decent alternative with uBlock (or equivalent) I'd switch on the spot! On a Pixel 6.
I used to have this issue on nightly (not annoying enough to make me consider switching though), but it dissappeared several months ago, haven't seen it since. Are you sure it's still happening