Bugged Bounties?

Cant tell if I havent killed them all or its bugged. no way of knowing like in Diablo 2 in the Den of Evil it gives a countdown when its less than say 10 enemies left.

I havent finished two bounties because I dont know if theres anyone left, after cirling through in every corner

Hello there , have you tried dropping them and retake them
it has fixed the issue for me in the past