There are times when mobs seemingly disappear, or appear shortly and then are un-interactable/unattackable and then disappear again. They seem to be moving around too when this happens before they disappear. I've observed this on multiple maps but I can't replicate it so unsure if it's truly a bug or some strange latency/rubberbanding issue.
#Mobs disappearing
eager raft
hallow cobalt
yeah i was grinding big scarabs for my mission. As soon its spawned. i was gonna kill it... its disappeared into different location.