NullPointerException in KegBlockEntity.updateTemperature() - repeatable crash on world load

[Kerolite]

Environment:

• Minecraft: 1.20.1, Forge: 47.4.20
• Brewin' And Chewin': 1.20.1-3.2.1
• Minimal reproduction: fresh creative world with ONLY Forge, MixinExtras (dependency), Farmer's Delight (dependency), and Brewin' And Chewin' - no other mods.

Steps to reproduce:

1. Create a new world with the minimal mod list above.
2. Place a Keg block.
3. Wait for it to tick (crashes almost immediately, ~15 seconds / 300 game ticks in).
4. Game crashes with a NullPointerException.

Crash cause:
NPE in KegBlockEntity.lambda$updateTemperature$8 (KegBlockEntity.java:497), inside a stream calling BlockStateBase.is(TagKey) on a neighboring block state. This calls Holder$Reference.is(), which fails on Objects.requireNonNull() - the Holder being checked is null/unbound.

Extensive testing performed (all crashes identical before narrowing down):
Originally encountered in a heavily modded pack (100+ mods). Progressively ruled out every external factor:

1. Removed unrelated mods (Project: Edgerunner, etc.) → same crash.
2. Broke the original Keg, placed a new one elsewhere → same crash (not corrupted block data).
3. Removed "Cocktails Delight" compat addon → same crash.
4. Removed ModernFix + Ferrite Core (blockstate/tag caching mods) → same crash, with the crashing line's mixin chain reduced to vanilla.
5. Finally reproduced on a brand new world with only Forge + required dependencies → identical crash, confirming this is a bug entirely internal to Brewin' And Chewin', unrelated to any mod interaction, world corruption, or caching mixin.

Attached:
crash-2026-08-19_01.12.50-server.txt

Suggested fix direction:
Add a null-check/defensive guard around the tag lookup in updateTemperature() (KegBlockEntity.java:497), since the underlying Holder reference for the block/tag being checked appears to be null in certain (currently unclear) conditions.