Server Disconnect When Alt+Tabbing

Self Explanatory by the title. Did not have this issue before the patch.

The only other useful information I can give is that since the patch, I was having an issue playing the game at all. I would log in, select my character, then it would crash each time loading.

I found a weird workaround that I mentioned in another thread where someone else had my issue, which was making a new character and then going to the character select. For some reason I've been able to play the game since.

But now, if I alt tab for what has to be about 60 seconds, I get DC'd and sent back to the main menu.
Performance has been even worse somehow since this hotfix, which I imagine there is some correlation. It's just annoying because I was fighting Doryani (Cruel).

I turned a bunch of graphic settings down but I guess it didn't matter.