Spectators drop player loot table

[GrantGryczan]

Expected behavior

Players in spectator mode should NOT drop a loot table on death, just like in vanilla.

Observed/Actual behavior

Players in spectator mode drop the minecraft:entities/player loot table on death.

Steps/models to reproduce

1. Install this minimal reproduction data pack by copying it into the server's world > datapacks folder. This adds a player head to the player's loot table unconditionally.
2. Op yourself in the server console.
3. Join the server, and enter /gamemode spectator.
4. Enter /kill @s.
5. Observe that a player head dropped. In vanilla or Paper, nothing drops.

Plugin and Datapack List

Just the minimal reproduction data pack.

Paper version

> version
[16:38:13 INFO]: This server is running Paper version 1.21.1-118-master@fb76840 (2024-10-02T12:49:56Z) (Implementing API version 1.21.1-R0.1-SNAPSHOT)
You are running the latest version
Previous version: 1.21.1-2315-2a50638 (MC: 1.21.1)

Other

I have not tested if this is also a bug upstream in Spigot, as the Spigot download link currently times out for me.