I was tweaking the end.txt file to change the text that is showing up when you complete the game. I killed the dragon and respawned him in again and logged out of the world before some of the end crystals on the towers weren't light up. And when I logged in again, it stops the respawning process and nothing happened.
Steps to Reproduce:
1. Respawn the Ender Dragon
2. Logg out of the world
3. Join the world again
Thank you for your report!
We're actually already tracking this issue in MC-105080, so I resolved and linked this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature in the future to see if the issue has already been reported.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – 📖 Game Wiki