I was able to get the crash to occur the two previous times I attempted to clear this base, but now it does not seem to be occurring. The two previous times I had halfway cleared the base using poison capsules, and then died to a fast biter, with the crash occurring as soon as they attacked me. But after trying several times to recreate the same situation today I'm now not having any luck with causing the crash to reoccur. If you end up opening the save, the base I was trying to clear is the one on the coal patch near the top left corner of the explored area.
Is it possible the crash has something to do with the void tiles that Ribbon Maze uses, and it's just coincidence it happened while I was attacking a base? I have been noticing some strange generation behavior with biters, where in some areas there are no nests or worms to be found, but there is a small patch of Krastorio creep right at the edge of the chunk, like the base generated inside the void between the paths. Could the chunk processor think that there are some nests due for upgrades that never technically got placed on the map because they were in void tiles?