[MC-215270] Moss requires air above a replaceable block to spread

The bug

When using bone meal on moss blocks, they are supposed to turn the adjacent blocks into moss blocks, however if the block has a torch, chain block, iron bar, fence, or any other block on top of them, the moss does not spread.

How to reproduce

Place a moss block with stone next to it, with a torch on top of the stone
Apply bone meal to the moss block
❌ The moss does not spread to the stone

Expected behavior

The moss would spread to the stone regardless of whether or not a block is present above the stone.

Linked issues

is duplicated by 2

MC-218970 Moss cannot spread to valid blocks if their top is occupied by non-solid, non-blocks on them. Resolved

MC-232866 Moss Blocks wont grow underneath fences Resolved

relates to 2

MC-264155 Bone Meal doesn't work on grass blocks beneath Cave Air or Void Air Open

MC-185353 Water can't be frozen with Frost Walker if there is a block on top Resolved

Attachments

Desktop Screenshot 2021.02.12 - 20.04.11.28.png

Desktop Screenshot 2021.02.12 - 20.04.23.50.png

Desktop Screenshot 2021.02.12 - 20.13.37.53.png

Desktop Screenshot 2021.02.12 - 20.13.46.76.png

MC-215270.mp4

Comments 21

Lickfold 2021-02-12T20:22:44Z

Not sure if it is working as intended, however I do see this as a bug

Heather Shadelight 2021-02-14T17:23:07Z

To rectify this, I suggest changing the requirement from "air block" to "any transparent block".

Avoma 2021-02-19T17:22:32Z

Can confirm in 21w07a.

Avoma 2021-03-20T14:11:26Z

Can confirm in 21w11a. Video attached.

Avoma 2021-04-02T15:46:10Z

Can confirm in 21w13a.

11 more comments

Avoma 2021-04-10T09:47:33Z

Can confirm in 21w14a.

Avoma 2021-04-14T18:55:36Z

Can confirm in 21w15a.

bugsbugsbugs 2021-04-21T19:13:02Z

Not fixed in 21w16a.

user-c84db 2021-04-21T19:20:16Z

I think Mojang accidentally marked this as fixed instead of [MC-215043].

Ray 2021-04-23T19:02:13Z

please reopen not fixed yet

Avoma 2021-04-30T18:53:34Z

Can confirm in 21w17a.

Avoma 2021-06-09T18:39:22Z

Can confirm in 1.17.

ampolive 2021-07-05T21:30:13Z

Can confirm in 1.17.1 Release Candidate 2.

Avoma 2021-07-18T09:25:11Z

Can confirm in 1.17.1.

Avoma 2021-10-30T09:47:06Z

I am able to confirm this behavior in 21w43a. Here are some extra details regarding this problem.

The Bug:

Moss requires air to be above blocks that it can replace, in order to spread.

Steps to Reproduce:

Build the setup as shown in the attachment below.

[media]

Apply some bone meal to the moss block.
Take note as to whether or not moss was able to spread underneath the torch, fence, wall, or glass pane.

Observed Behavior:

Moss requires air to be above blocks that it can replace, in order to spread.

Expected Behavior:

Moss would not require air to be above blocks that it can replace, in order to spread.

Avoma 2021-12-08T14:20:36Z

Can confirm in 1.18.

MMK21 2021-12-09T18:14:53Z

Relates to MC-185353

Avoma 2022-03-07T09:44:36Z

Can confirm in 1.18.2.

Avoma 2022-03-18T20:06:11Z

Can confirm in 21w11a. Relates to MC-249233.

windwend 2022-04-09T00:15:16Z

Related to MC-227361.

Avoma 2022-06-25T10:30:47Z

Can confirm in 1.19.