DUMP:https://underhound.eu/crawl/morgue/Colgate/Colgate.txt
This looks like this was supposed to be closed vault but for some reason its habitants were roaming free. There was hellephant which felt quite early for Vaults:1. I think it was shapeshifter larping water nymph, that broke vault monsters free.
after you finish the game please post the morgue here so we can check if there was a digging enemy or the vault is messed up!
https://underhound.eu/crawl/morgue/Colgate/morgue-Colgate-20231231-141607.txt here is morgue
RIP
Looks like a cacodemon spawned in the vault and dug out, I’ve reported it to a dev!