Raids have 1 raider remaining that is non-existent.

Ok, so im doing a raid in minecraft raid, and I run out of arrows, so I have to wait till night to get more from skeletons, and once I do that and kill all the raiders, it says theirs 1 left. I look for it, and I cant find it! I spent quite a while doing the raid, and now I cant find the raider. I'm not using cheats in any way, No mods, no nothing.