Cannot "Cast Detonate Dead"

You can see on 1:03, it's normal but when I move to Corner or Door, I can't cast Detonate Dead anymore / or it get super delay to detonate corpse 1:25
https://www.youtube.com/watch?v=gYRWtKbjyEU

Same issue in narrow map. Half of it must be the "line of sight" targeting blocked by map obstacle. The other half by the way of latency between client and server is handled, not seeing things where there are really on the server.

Ritual have some issue too, for me doing ritual with sacrifice/detonate dead is nearly impossible, 90% of my cast result in nothing even if y target my minions.