Guild Wars 2

I am noticing very recently on my Hunter and Mesmer that when I am fighting in combat, it switches targets on its own.

I have gone ahead and turned off auto targeting in the options and this does resolve the problem.

The issue is its annoying to have to hit tab every time I kill a mob to pick it up again. So the option for Auto Target being turned on is very helpful, but its also causing a false auto target problem.

I am on target A.
Suddenly before the mob dies at random health it switches to another target (B)

The problem is a mob is almost dead in some cases and I am now attacking a fresh mob resulting in the first mob is still alive and should have been dead by now.

This is a RECENT problem. This is not an issue with my keyboard or play style. I have asked other people who I play with and they are experiencing the same problems on these classes. It is possible its more than these 2 classes, but I have not experienced this problem on my Engineer at all.

Seems like a problem within the last 2-3 weeks that is REALLY annoying.

Happens to me too