I'm not exactly sure how to explain this, but after I tried to reload an autosave after I got raided by fire ants, let me just say, things broke. This has happened before, but I assumed it would get fixed with the fire ant update. That doesn't seem to be the case.
Freeplay hasn't been touched yet so it's not surprising. The rough plan is for the 3 main devs to spend, like, a month working solidly on freeplay before they get back to campaign content.