No arms for vindicators

So I really Love playing Minecraft and I know there are lords of bugs out there and this bug is somewhat a minor one but really has a impact for this raid system. So I did a challenge where I would start a raid on hard difficulty and wear nothing but full chainmail armor with stone tools and a crossbow. I am a pretty good archer and luckily, the village was a plains village with one of those tall cobblestone churches, so I ranged shot those ill willing villagers. Unfortantly, somehow I lost the raid because I heared and saw the pillagers jumping up and down with their crossbows in the air, but then I made a terrible discovery. Before I jumped out of the church, I saw in the distance, the vindicator was jumping up and down with no arms!!! it looks so weird.