[Patch Request] MC-192420 Iron bars Z-fight on the bottom and top

[lostopkk]

Mojang Bug Report ID

MC-192420

Bug adhere to the guidelines.

• [X] I made sure that this bug adheres to the guidelines.

Has not already been requested.

• [X] I am certain this patch has not already been requested.

Has not already been implemented.

• [X] I know that this patch isn't already in the latest version of the mod.

Existing implementation

No response