[Bug] Hanging Signs Render Incorrectly with Platform + Optimized Block Entities (NeoForge 1.21.1)

[Diamondback88]

On NeoForge 1.21.1, when Platform is used together with Optimized Block Entities, hanging signs render incorrectly like so:

If you add other mods that add other types of hanging signs, only the vanilla hanging sign types are affected; the modded hanging sign types render correctly.

Log: https://mclo.gs/CrZxO7w

How to replicate:

• Install NeoForge 1.21.1 and the latest versions of Platform (1.3.3) and Optimized Block Entities (1.1.31)
• Boot into singleplayer and place a vanilla hanging sign

[Diamondback88]

From the OBE dev:

If this only happen with Platform and not without it, then I believe this is an issue on their side

Originally posted by @maDU59 in #57

[maDU59]

This doesn't happen without Platform, my guess is that it changes how the sign block entity type work? I think somehow BlockEntityType<SignBlockEntity>.accept(HangingSignBlock) returns true

[maDU59]

https://github.com/ItsBlackGear/Platform/blob/1.21.1/common/src/main/java/com/blackgear/platform/core/mixin/common/BlockEntityTypeMixin.java
It should be StandingSignBlock instead of just SignBlock, (or at least change the order of the conditions), HangingSignBlock does extend SignBlock

[maDU59]

Here's a PR with the fix: #23