Game sporadically stops responding at certain ingame times

[1straycat]

So I have a very weird one, pretty much just hoping someone's run into the same and knows what it is because it's so nonspecific.

At seemingly random, but specific "fatal" ingame times, KSP will freeze and just stop responding, with the cursor turning into the windows progress circle like this. 


It doesn't seem to correlate with any system stress, can happen when I have plenty of CPU, GPU, and, RAM to spare, and I haven't found any pattern in the game logs (but they don't seem to capture the cause of the crash).  I've tried leaving the game open for an hour and coming back with no changes; after it happens I can only end the process. But it happens at a certain ingame time consistently, which I've noticed because I left kerbal alarm clock open and noticed the same time left to an alarm at the moment of freeze. Once this happens, it will reliably happen again at the same time (or the frame after it if timewarping) once I restart the save. It doesn't matter which vessel I'm on, or if I'm in the KSC or tracking station. If I restart the game, enter the save, and time warp straight to the fatal time, I will crash right away. Or I can do other things in the save for hours no problem until I hit the fatal time. I can eventually get past the fatal time by using time warp, but this seems to fail 95% of the time.  I've had it happen in the middle of a spaceplane reentry and was eventually able to physical timewarp past it. Once I'm past it, I'm usually fine for days of gameplay before it happens again.

Anyone seen anything like this?

 

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ABookCase Orbital Reference System (ABCORS 0.5.1.5)
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