Eye of Ender items behave differently than vanilla.

[Chuzume]

Minecraft Version: 1.20.4

NeoForge Version: 20.4.227

Description of issue:
In vanilla Minecraft, using the Eye of Ender in a world without stronghold slows down the player and triggering the Advancement "using_item" without consuming the item, but in NeoForge this Advancement cannot be triggered.

There are a few data packs that use the Eye of Ender trigger, but these will no longer work in NeoForge.
Also, this has been confirmed since Forge.

In vanilla

Vanilla.mp4

In Neo Forge

NeoForge.mp4

[Shadows-of-Fire]

How do you generate a world without a stronghold?
Resolved via datapack

[Shadows-of-Fire]

This is caused by a bugfix that forge has in place for https://bugs.mojang.com/browse/MC-107185

Our policy for vanilla bugfixes is to keep them in place unless major detrimental issues arise (i.e. MinecraftForge/MinecraftForge#9309); as such, we will keep this fix, though the patch for it (below) needs to be updated to explicitly reflect the bug that it is fixing (as it currently does not).

NeoForge/patches/net/minecraft/world/entity/LivingEntity.java.patch

Lines 510 to 511 in a7edbae

	- if (--this.useItemRemaining == 0 && !this.level().isClientSide && !p_147201_.useOnRelease()) {
	+ if (--this.useItemRemaining <= 0 && !this.level().isClientSide && !p_147201_.useOnRelease()) {

Leaving this issue open for the time being as a reminder to add the bug reference.

[tmvkrpxl0]

How do you generate a world without a stronghold? Resolved via datapack

Btw flat world would've worked as well

[TelepathicGrunt]

@Shadows-of-Fire what about the advancement part of the issue?

triggering the Advancement "using_item" without consuming the item, but in NeoForge this Advancement cannot be triggered.

If using the item doesn't trigger the advancement like vanilla does, then the patch will need a slight adjustment to fire the use advancement without slowing the player down.

[Shadows-of-Fire]

There's no way to keep the patch and maintain the behavior that triggers the particular advancement - the fact that it triggers at all is a bug (as indicated by Mojang), which means this behavior could stop functioning in any MC release.