strange because i monitored every single bot to make sure theyre moving or just doing something other than being invisible and stuck facing south, the only singular exception to this was a weird pmc at big red which either died in a weird way or just was a 1/1000000 chance death where his icon showed he was alive but his corpse was frozen in place. I never had any other issues with bots at extracts or anything like that. But since you and others mentioned it is indeed questing bots, i shall mark this topic as solved.
TL;DR for anyone with this problem: do not use the latest version of questing bots (0.9.1, use 0.9.0 instead), and also make sure your scav bot cap is set to on in donuts.