Red Mushroom colliding with Ruin Portal

Seed: 5450957878814971038

How to reproduce?
1. Install Snapshow 21w42a
2. Play Minecraft with Snapshot 21w42a
3. Create a new world with the specified seed
4. Teleport to this coordinates -> /tp @p -2255.429 67.11650 216.920

Red Mushroom structure colliding with the structure of the Ruin Portal. This bug occured on the minecraft:dark_forest Biome.