Crash when using a non-mushroom block in a huge mushroom feature's cap

Hi,

I was trying to use huge mushroom features to generate non-mushroom blocks in a world-generation datapack. However the game refuses to generate these blocks and crashes because it tries to set a property which does not exist on the block.

I have attached the crash, the datapack and the offending feature (`crash_mushroom.json`).

How to reproduce

1. Install the

1. datapack on a world

2. Navigate to coordinates (300, 64, 300) in the nether

   /execute in the_nether run tp @s 300 64 300

3. Observe the game crash