[MC-125675] Seagrass placed on the ocean floor can replace ocean monument parts

The bug

Seagrass on the ocean floor can override parts of the monument.

How to reproduce

Seed: 1325200798562914260
Coordinates: /execute in minecraft:overworld run tp @s -672.50 35.18 -172.80 616.51 22.50

Linked issues

is duplicated by 4

MC-126563 Monument pillars generation does not replace tall seagrass Resolved

MC-126759 Sea grass deleting ocean monument blocks Resolved

MC-126989 Seagrass destroys ocean monuments Resolved

MC-137324 Seagrass can replace blocks of monuments. Resolved

relates to 2

MC-125040 Mushrooms in swamps replace trees Resolved

MC-125396 Two high sea grass placed inside ocean monuments overrides parts of the walls Resolved

Attachments

Comments 12

tryashtar 2018-03-06T18:52:28Z

I think the more likely explanation is that the grass is generating first, then the monument places its pillars all the way down to the topmost block – which can in some cases be the pre-existing sea grass.

Oval 2018-10-19T21:06:07Z

Confirmed for 1.13.2-pre2.

gaspoweredpick 2019-04-01T02:16:36Z

Confirmed for 19w13b

user-f2760 2020-11-03T15:08:36Z

Confirmed for 1.16.4.

Avoma 2020-12-18T19:49:49Z

Can confirm in 20w51a using the provided seed and coordinates.

2 more comments

Avoma 2021-02-12T11:45:48Z

Can confirm in 21w06a.

user-68c81 2021-04-22T18:29:42Z

Can't reproduce in 21w16a. There were changes to monuments in earlier snapshots, so it might be fixed.

user-c84db 2021-04-22T18:33:28Z

Probably fixed in 21w07a along with the fix of MC-211224.

user-aa418 2021-08-28T04:06:47Z

I am unable to reproduce this issue in 1.17.1.

wobst.michael 2021-08-30T11:33:27Z

This has indeed been fixed along with MC-211224.