the ender dragon didn't spawn in the end when i went through the portal, the portal didn't spawn either.

*What I expected to happen was that the ender dragon would spawn and i could beat the game in hardcore.

*What actually happened was there was no dragon or pre-spawned portal and i was trapped.

Steps to Reproduce:
I found this happened sometimes when i was enjoying the new snapshot in creative but it hadn't happened for a bit so i thought is was okay so i don't really know what causes the bug but if there is any way to fix this please do so.

-wil