Hey there! Recently noticed this strange bug. While I was playing, I accidentally started a raid. In order to quickly cancel this, I switched to peaceful mode. By doing so, the raid bar disappeared (as it normally does) but when I switched back to hard mode, the bell (when rung) still resonated as if a raid was on-going.
This is working as intended, because the bell just checks if there are raiders nearby. It doesn't check if the raid is still ongoing. This allows the bell to also be used outside of a village to find nearby raiders 🙂