As the 24w33a changelog says:

• A triggered raid will no longer start if the raiders cannot find a place to spawn within a reasonable distance of the village they are trying to raid

However, I noticed that raiders sometimes would not spawn even if there are close enough places around the village.

Steps to reporduce:

1. Create a default type world with seed: 23925373020405760
2. Teleport to 204 65 110
3. Place a composter at 202 62 111 and summon a villager beside it
4. Drink a ominous bottle
5. Wait for a minute and the raid ends without any raiders spawned
6. Repeat steps 4 and 5