Put the summary of the bug you're having here

What I thought would happen was when I destroyed all crystals(which heals the dragon) then the dragon would occasionally come down to the bedrock where the portal and egg appears once you defeat the dragon and I would win once I defeated the dragon. 

What actually happened was when I shot all the crystals, I didn't see them fully explode which seems normal since they were far away from where I was, so I destroyed rest of the crystals and the dragon only came down ONCE. Then he started flying around and circles and that was all. I tried leaving and rejoining my game but he was back to full health and did the exact same thing! I made sure that this wasn't just a seed problem and tried it on a different game and this still happened. I understand that 1.14 was just released and asking for this bug to be reviewed and fixed. Thanks. -BossyElephant (That's my MC username) 

Steps to Reproduce:
1. Shoot all crystals from afar on obsidian pillar (maybe this is what caused it? I'm not entirely sure)