I was playing around in the latest version - 1.22.9 - when I noticed that the gorilla mob does not pathfind and attack you when aggroed unless you go and stand right up against it, however, in a previous version 1.22.8, it pathfinds just fine. I looked at the changelogs and it seems to be the pathfinding change that's doing this

forge 1.20.1 - 47.3.29
alexsmobs-1.22.9
citadel-2.6.1-1.20.1