After issue #317 was closed, I downloaded and installed the latest (5.3.2) version of the mod, as well as updating a few other mods and Forge to the latest, and went to test it. Upon starting my game, I checked the modlist and Rats is . Launched game, and played for a little while. Stayed outside the first night, doing some work outside, when suddenly I noticed a mob on JourneyMap. As I got closer, the piper's whistle started. It had spawned inside a 6 x 6 room, with 2 torches on each wall; no way that's not well lit.

Let me know if you need any further info.

Fixed in 5e55839

Even worse, I went into the config and re-disabled natural piper spawns, and they still spawn now.

Scratch that second bit; perhaps the setting needed a reload to go into effect? The pipers don't appear to be spawning now.

This problem is making it near impossible to have villagers survive, since the piper will still show up and merc everyone in a fully lit, walled village.