It wasn't the newest version, went back to replicate it and nothing happened, so it was probably just one time issue.
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Then I have an explanation for you that most likely woudl explain it.
Your game probaly runs over 60 fps, which could cause a bug that could lead to random crashes because of a error in the engine.
One of the newer version fixed that, so if you had an older version it may be that you are experience that bug.
I can't say for sure, but for now that is the best explanation i could come up with.
If you have the feeling that enemies and other objects like npc's are moving to fast be sure to try turning on the 60 fps lock option in the option menu
I also would recomemnd grabbing the newer version, don't worry your save would still be compatible!
Sorry for the inconvenience!