Expected behavior
When scaling a player (e.g., via a mod or plugin like SnC that modifies entity/player scale), combat interactions such as hitting or being hit should still function normally. Specifically, entity detection for attacks should align with the visible hitbox and properly register hits regardless of the entity's Y position or scale.
Observed/Actual behavior
When a player is scaled up using the "scale" attribute, combat detection becomes inconsistent. Hits often fail to register unless the player aims near the "feet" of the scaled entity. This issue does not occur on Fabric/Forge with the same setup — only on Spigot/Paper. It severely affects gameplay in scenarios involving large-scale entities (e.g., Titan shifters).
A side-by-side comparison video demonstrating the issue is available here
https://drive.google.com/file/d/1FGwJ0MITYNYZxQhFPLVzXYfP5tO1lWSb/view?usp=sharing
Steps/models to reproduce
I'm attaching a datapack where I trimmed the functions I'm using for my project, you need two players in order to test it. Instructions pop up once you enter the world
Damage.zip
Plugin and Datapack List
[21:58:16 INFO]: Bukkit Plugins:
[21:58:16 INFO]: - LuckPerms, Vault, VaultChatFormatter, WorldEdit
[21:58:51 INFO]: There are 5 data pack(s) enabled: [vanilla (built-in)], [file/bukkit (world)], [paper (built-in)], [file/Shingeki-no-Craft.zip (world)], [file/Damage.zip (world)
Paper version
[21:59:34 INFO]: This server is running Paper version 1.21.3-83-ver/1.21.3@d6c81da (2025-03-28T15:57:09Z) (Implementing API version 1.21.3-R0.1-SNAPSHOT)
You are running the latest version
Previous version: 1.21.3-81-da71382 (MC: 1.21.3)
Other
No response
Expected behavior
When scaling a player (e.g., via a mod or plugin like SnC that modifies entity/player scale), combat interactions such as hitting or being hit should still function normally. Specifically, entity detection for attacks should align with the visible hitbox and properly register hits regardless of the entity's Y position or scale.
Observed/Actual behavior
When a player is scaled up using the "scale" attribute, combat detection becomes inconsistent. Hits often fail to register unless the player aims near the "feet" of the scaled entity. This issue does not occur on Fabric/Forge with the same setup — only on Spigot/Paper. It severely affects gameplay in scenarios involving large-scale entities (e.g., Titan shifters).
A side-by-side comparison video demonstrating the issue is available here
https://drive.google.com/file/d/1FGwJ0MITYNYZxQhFPLVzXYfP5tO1lWSb/view?usp=sharing
Steps/models to reproduce
I'm attaching a datapack where I trimmed the functions I'm using for my project, you need two players in order to test it. Instructions pop up once you enter the world
Damage.zip
Plugin and Datapack List
[21:58:16 INFO]: Bukkit Plugins:
[21:58:16 INFO]: - LuckPerms, Vault, VaultChatFormatter, WorldEdit
[21:58:51 INFO]: There are 5 data pack(s) enabled: [vanilla (built-in)], [file/bukkit (world)], [paper (built-in)], [file/Shingeki-no-Craft.zip (world)], [file/Damage.zip (world)
Paper version
[21:59:34 INFO]: This server is running Paper version 1.21.3-83-ver/1.21.3@d6c81da (2025-03-28T15:57:09Z) (Implementing API version 1.21.3-R0.1-SNAPSHOT)
You are running the latest version
Previous version: 1.21.3-81-da71382 (MC: 1.21.3)
Other
No response