While building structures if you hit the undo button, lets say 2 or 3 times the game will crash
I too have had the same issues at different points (depending on size or if it involves mining). Or it just spam’s me with errors 
However it doesn’t happen often to me any more. But yeah, It’s defiantly something that happened’s. What version are you using? Alpha 6 or 7? I’ve been playing on Alpha 7 about 5 hours now with very rare issues 
I’m using Alpha 7 Build 180