I mainly play as a mage, and i don’t think i encountered something similar to this with my mage.
When i was playing as a musketeer, farming, sometimes i would not be able to hit any monsters, it happened a few times during the combat, i couldn’t hit the monter or trigger any of my orbs, they would fire, but not trigger (my turret worked fine).
The strange thing, is that even though i couldn’t hit, i could talk to other people in the area (other people were able to hit the same monster i was not able to) and i could aggro mob (by just being close to them).
last thing to note, i was fighting the hogs in the rainforest, and even though i moved out of their AOE a good 2 sec before it triggered, i still got shot by it (ultimately dying because it one shotted me ^^)
It has been happening pretty regurlarly to me today (i have started playing musketeer yesterday), sometimes i had to disonnect to resolve the issue, sometime when i resurrected it was fine.