Tall seagrass only generates lower part when ocean monument is in the way

Can confirm in 1.13-pre3.

Confirmed for 1.13.1.

Confirmed for 1.13.2-pre1.

Updated coords: /tp @s -272 38 29999812 50 20

Confirmed for 1.15.1

Updated coords: /tp @s -322 39 29999773 -38 25

Confirmed for 1.16.4
Seed: -1068542394661828446
Coordinates: -9420 36 -2384

Can confirm in 20w49a.

Can confirm in 21w03a.

Can confirm in 21w06a.

Can confirm in 1.17.1.

Can confirm this in 21w40a.

Can confirm this in 1.18 Pre-release 4.

Here are some extra details regarding this problem.

The Bug:

Tall seagrass only generates its lower half when ocean monuments generate above them.

Steps to Reproduce:

• Generate a world with the following seed and teleport to the following coordinates.

Version: 1.18 Pre-release 4
Seed: 2671478887814226195
Coordinates: /execute in minecraft:overworld run tp @s 18670.72 36.35 723.29 572.46 -6.92

• Take note as to whether or not tall seagrass only generates its lower half when ocean monuments generate above them.

Observed Behavior:

Tall seagrass only generates its lower half when ocean monuments generate above them.

Expected Behavior:

Tall seagrass would not only generate its lower half when ocean monuments generate above them. Instead, they should not generate at all to avoid this issue from occurring.

Can confirm in 1.18.1.

Version: 1.18.1

Seed: -6137888219909752578
Coordinates: /execute in minecraft:overworld run tp @s 5289.02 37.00 1128.08 -34.22 5.76

Can confirm in 1.19.

Version: 1.19

Seed: 4373241205666815302
Coordinates: /execute in minecraft:overworld run tp @s -12007.58 36.91 -22718.16 -541.90 -0.34

Can confirm in 1.19.2.

Can confirm in 1.19.3

Can confirm in 1.21.4 Pre-Release 2. Also would like to request ownership of this report to maintain it.