I was working on one of my newest buildings when i saw three pillagers crossing my bridge, I killed them, then i got a weird effect, and I figured out that it would start a raid if i went into a village (I assumed this from the achievement side note). The effect was in the same spot and position as a potion effect, so i thought that milk may take it off. As soon as it worked, I knew it was a bug. I think it was because it was entered in the code as a potion effect, and someone forgot to make it immune to milk, unlike regular potion effects. I was thinking about exploiting, but the report bugs button was there for a reason, so I decided to use it. Now that the symbol is gone in the top right of my screen, I'm not sure that I am still safe to go in my village, since it is a bug.