Targeting/hitting single MOBs with melee combat skills (in this case, Vengeance from Sentinel tree) seems off. The target boxes on the MOBs seem almost non-existent at times. Can wail away on a critter and never make contact.
I do not believe it to be a Dodge issue as a.) the MOB combat text never displays the “Dodge” notice and b.) I can attack the MOB continuously for a minute or more and never make contact. However, if I step away, re-target and swing… boom, dead in a shot or two (what would be expected if targeting had worked initially.)
FWIW, issue seems most noticeable vs. Skullen MOBs
Example: https://youtu.be/JB_LYNM462U (attack on Skullen MOB starts at approx. 0:08 and goes for about 0:30 before I re-target/kill)