The bug

Normal drops

Mushroom stem (brown_mushroom_block:15) and the mushroom block with the pores textures on all sides (brown_mushroom_block:0) - available from the Creative inventory - drop 0-2 brown mushrooms when destroyed with any non-Silk Touch tool. This isn't expected to happen for a few reasons:

• Mushroom stems drop nothing in Java Edition, so it's a parity issue
• The stem and all-pores blocks are meant to be generic, not tied to any kind of mushroom.
  • There's only 1 kind of mushroom stem and 1 kind of all-pores mushroom block in the Creative inventory.
  • When mined with Silk Touch, naturally-generated stems of red and brown mushrooms drop the same kind of mushroom stem block. You don't expect to receive brown mushrooms from a stem obtained from a huge red mushroom.

Taking this into consideration, naturally-generated stems should be changed too in order to be consistent, so instead of dropping 0-2 red/brown mushroom they should drop nothing. Note that they also drop nothing in Java Edition.

Lastly, there are a few unused variants of all-pores and all-stem mushroom block that should be changed as well for consistency reasons.

Silk Touch drops

All-pores mushroom block drops the brown mushroom cap block instead of itself when mined with Silk Touch. This is a similar issue to MCPE-69012, which has been fixed.

Suggested fix

• All mushroom stems (both brown and red) should drop nothing as normal drop and brown_mushroom_block:15 (generic 6-sided mushroom stem) as Silk Touch drop.

• All 6-sided mushroom pores (both brown and red) should drop nothing as normal drop and brown_mushroom_block:0 (generic 6-sided mushroom pores) as Silk Touch drop.

• Only cap variants should drop 0-2 small mushrooms.

The following tables summarize the expected drops from every mushroom stem and mushroom pores variant. Drops that are already correct are written in green, while drops that are currently wrong are written in red.

brown_mushroom_block

red_mushroom_block

Yes, I love mushroom blocks

Related issue with mushroom pores: MCPE-71117 (incorrect inventory name)