What I expected to happen was...:
Amethyst geode spawning normally

What actually happened was...:
Launching a new world with the caves and cliff experiment, I found this geode that had seagrass overlapping a block, creating an air pocket.

Steps to Reproduce:
1. Launch Minecraft Bedrock 1.17.40
2. Create a new world that has the seed 2133975603 and with the Caves and Cliffs experimental features
3. Go to the coordinates x 204 y 49 z -1286