When the ships are destroyed i get pause/lag. Sometimes I get freezing/lag and sometimes the game just crashes (the log is from when the came crashed) and it is always when the ships are destroyed. The most crashed I get so far is in the Lifeboat test mission.
I've also noticed one thing while playing... When i right click the mouse to look around and right click again to go back to my cursor I can't sometimes do this and I must click several times to leave the "view" mode (sometimes left and right clicking helps, sometimes not). Also when I get this lag when the ships explode and I'm using mouse to turn the periscope the mouse view "unclicks" itself and goes back to the cursor mode.