I am running 18w50a, and I'm not sure if this is a bug or not. I lost all the villagers in a village while I had the bad omen V effect, thus ending the omen effect. What's odd, is that the pillagers and vindicators then proceeded to ignore me, and bee-lined, toward the next village in range. I followed them, and even killed one pillager on the way, still no reaction from any of them, including the one I attacked/killed. After following them 3000 blocks, instead of attacking the next village, they went past it, and just kept going. One survived various fall damages, and continued until he reached my last spawn point, and then just stands there spinning and grunting.