Using pick block on the all-pores mushroom block gives a brown mushroom block instead of itself

When using pick block on the all-pores mushroom block found in the Creative inventory (brown_mushroom_block with the huge_mushroom_bits value set to 0), a brown mushroom block is given instead of the all-pores mushroom block.

This is because the all-pores block inherits its properties from the regular brown mushroom block, despite being a generic block and not explicitly a brown mushroom block. See also MCPE-71123, which affects its drops when mined.

This issue also affects the other all-pores states of both brown_mushroom_block and red_mushroom_block, but they are all unused and unavailable without commands.