I killed the ender dragon and last hit it by exploding a bed under it. It died and gave XP as it should, but I didn't get the "Free the End" advancement.
Steps to Reproduce:
1. Get the ender dragon's health low however you want (bow, beds, etc).
2. Last hit it by exploding a bed underneath it.
3. The advancement isn't given (but you can get the one for holding the dragon egg).
Thank you for your report!
However, we are already tracking this issue, and this report is a Duplicate of MC-165919, which is a report that has not been resolved yet.
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