I was playing in my new world when I killed an entire patrol and got the bad omen effect. When I went to the village close to my base, the effect disappeared, the raid bar began to load, but then it just disappeared. 

You can watch a video that will help you understand the problem:

https://www.youtube.com/watch?v=00V-bqpU5Jc&list=PL0WKX3ypIFgRXCUUAs9qy3Iyy7rN_PNlu