[2021] Unhandled exception C0000005 - Early Midgame

In that dxdiag we see a couple of hangs in stellaris.exe but no crashes reported. And there are no significant errors in that log file either. Very odd.

It is possible this is a game bug as you say, but then why would everyone not be seeing it? And generally a game bug will be triggered by a specific action or event in the game, not at random points during play.

Do you have a save game file that reliably triggers this problem for you? If so please attach it here.  

I ran that save for a year with no problem. Is there any particular action or event that triggers the problem for you, in that galaxy?  

If you feel this is a game bug you should make a new thread in the Bug Reports forum - we can't fix bugs here!

However if QA can't reproduce the problem it will never get to the developers. I've just run that new ironman save on another machine, Windows this time, for 20 game years without a problem. Damn!

Do you have one that does this which is not Ironman? That way I can run it in observe mode overnight.  

Okay then, let me know if you do see this in a non-Ironman game, I'm happy to test that for as long as necessary.