Thanks for playing, and sorry about the bug! You're the first to encounter it, that I know of. I fixed a bug with dead enemies in my local build (which I'll upload after voting ends), though, so maybe it's related to that.
So there were no enemies in the room with you at that point? To clarify, toxic plants, crawlers, and turrets (and the boss, but it doesn't seem like you were in its room) are all enemies. There also shouldn't have been any dead enemies, since they get "vaporized".