Resolution: Awaiting Response
Affects Version/s: Minecraft 17w50a, Minecraft 18w10d
Fix Version/s: None
Here is how to get this glitch:
1: Open Minecraft: Java Edition in Snapshot 17w50a.
2: Create a new world with world type set to AMPLIFIED, use the seed 4237599434424850135 and use Creative Mode.
3: Teleport to X: -507 Y: 144 Z: 58
4: You Will see that a tree had spawned on top of a Tree.
Mojang, please fix this.