I use my mouse to rapidly turn the camera during combat and it’s causing me to have my target drop. It happens when you hold left-mouse to turn the camera and let go very quickly.
Please don’t treat a quick camera turn as a left-click as that seems to be what is happening. If I hold the left-mouse for about 1s this behaviour doesn’t occur, but does when you do a rapid turn that is much less than 1s.
Normally doing a left-click on terrain will remove your target selection so I think the logic that determines the left click is broken as it doesn’t account for a rapid left-mouse hold camera turn. I have a very fast reaction time so when the target drops I sometimes blow skills before I can process that the drop occurred and is causing me significant usability issues.