I have to drink 2 ominous bottles to start a raid

Good evening, since a week ago I started to suffer a handicap in my survival world, I built a raid farm which forces the spawn of the raiders on a platform...

All was going on good, however, the game started to fail and then, when I drank the potion, it didn't started and  I had to drink other one to start the raid.

I have tried to start other raids in different villages and there are not results.

I don't know if this is caused by the version, by the farm's structure or I don't know.