Customizing huge_red_mushroom feature crashes the game

While generating custom dimensions:

Using a type "decorated" feature, with "heigtmap" decorator and only "minecraft:huge_red_mushroom" feature, generates huge red mushrooms as expected.

BUT

Customizing the huge_red_mushroom values and changing the blocks/radius variables crashes the game while generating the biome the feature is placed.

Attached images show both scenarios.