Side-Quests not updating

idk how to name them. those markers on the map that aren't quest related, but are one time, like some bosses i.e. Rootdredge

both cruel difficulty:
yesterday the 'Abandoned Shrine' (Keth) simply didn't get updated to "complete". had to wait for instance to be closed, tried again and then it worked.
just now: 'Rootdredge' (Sandswept Marsh) same issue. i killed him, i literally am standing next to his corpse. yet it's not completed either. hadn't had that issue once until yesterday. on any characters anywhere. and unless i was super lucky so far (judging by my horrible weapon rolls, i'm not ^^), that's new.

however, the server issues are getting worse on EU side. maybe it's just that. pls for the sake of your own game and company, do something about those server issues. judging by other threads on this forum, ppl are quitting simply because of that.
and please address so you're aware and working on it. :/

thx

update:
freshly generated instance, just killed Rootdredge again. still not grayed out on map

yea it just doesn't work. tried again

pls don't ban me just because i try to get this freaking icon crossed out. i'm not farming or anything (not that that would be worth it anyway). i just MUST have it crossed out for personal reasons *sigh*

i swear i'm not bug abusing. i just must get it crossed out