desync issues

I have been getting major desync issues ever since patch 9.8.2c

I will be attacking a mob with resolute technique and i just miss and miss and miss. then i will use an aoe attack in a different area and the mob in front of me dies but the loot it drops, drops over where i used the aoe attack (sometimes far away from where the mob appears)

what's more, sometimes a mob will appear to walk up to me and will start trying to attack me, but won't hit me and then it will disappear

i have experienced these issues at all times of the day and with high and low server population (checked with /online)

so far this doesn't seem to be localized to any one area, it happens across multiple maps and acts and difficulty levels.

i haven't tested this in hardcore league yet, only in default.

i didn't experience these issues at all before patch 9.8.2c

I'm sure this a sync problem dealing with obstacles.
I've had enemies show on one side of a wall, when they were actually on the other. Attacking them from the other side snapped them back into place and worked.