[Outdated][Bug 1.23] Freeze on alt+tab

So I have noticed on multiple occasions that if I open the game but leave it in the background to run by itself, after a while it will completely freeze and not resume even if left for a longer period of time.
I believe this is due to it trying to catch up as it seems like the game semi pauses whenever you are tabbed out?

This happens on two of my machines, specs available on request

Are you running Full Screen? And Version 1.23?

I have noticed this as well, when running full screen, and 1.23, I was blaming my old laptop, lol. When I run windowed Mode, it does not seem to be an issue. Also, running full screen, the Print screen capture method only shows a black image. Not sure if that helps at all.