Last week I hosted a foray into The End to kill the ender dragon in my realm. We had a nice turnout of 8 players. The first dragon we encountered was glitched, stuck in a block, flapping away uselessly, unable to be hit or be hit. We respawned the dragon and were able to kill this one, while the other one flapped away uselessly nearby. I delivered the killing blow, I think.

Everyone else in the expedition got the achievement for killing the ender dragon, as well as the achievement for respawning the ender dragon. I got neither, only the Dragon's Breath achievement. This is the second time I've helped kill an ender dragon, the first being last year hosting friend in my world.

Is this glitch related somehow to my being the realm's owner?