The bug

The raiders cannot patrolling effectively in scattered houses, or a house with densely packed beds in one place and scattered beds in other place. They often going back and forth in a house, and they will not reach the farther village houses either, make them unable to find the villager and win the raid.

This was evident in a four-bed house, where they would patrol back and forth, and they never reach the farther houses.

Steps to reproduce

1. Start a raid.
2. Make sure there is at least one villager hiding in a farther village.
3. Make sure the house's door was closed, and no iron golem in this village.
4. Spawning large number of of vindicators.
5. Observe their behavior.

← They will never go the house and find the villager, make them unable to win the raid.

Expected behavior

The raiders will finally found the villager, and then win the raid.

Observed behavior

The raiders patrolling in only one place, they will never reach the farther house, and unable to win the raid.