When a dialog subtitle is stuck on the screen and doing go away.

Go to options turn on subtitles on and then off again.

I also notice when you get multiple calls they overlay each other, instead one after another.

Yeah, i played all night with that subtitle background overlay that looks like a censoring bar on the middle of my screen.

I also got two quests talking to me in the same time multiple times.

You are not alone in this disgrace of a game state.