I've had quite a few problems with my tab function as of recently. It seems that out of no where, it goes haywire and starts targeting EVERYTHING on my screen in a super fast way. I don't even have to be hitting my "change target" button for it to go off either, it does it on its own.

At first I thought it was my keyboard (in case I DID hit the change target button and it got stuck) so I took out the batteries. Nothing. It still cycled like mad. I have even used the windowed mode to see if it was affecting my computer (outside of FFXIV), but nothing.

I have to completely exit FFXIV in order for it to reset. Just going to the character select screen doesn't do it.

It seems that a few patches ago (within this month) was when it started to do it.