ExperienceOrbMergeEvent not called for all merges

[Machine-Maker]

Expected behavior

ExperienceOrbMergeEvent should be fired for all XP orb merges.

Observed/Actual behavior

the event is only fired for merges that occur as a result of one orb being added to the world.

Steps/models to reproduce

0. plugin listening to ExperienceOrbMergeEvent
1. Disable all forms of entity spawning, gamerules, etc.
2. Spawn an xp orb: /summon minecraft:experience_orb ~ ~-5 ~ {Value: 5}
3. Spawn 39 other entities (orbs only merge if their entity id difference % 40 == 0)
4. Spawn another xp orb with the same value.
5. Verify they merged with /execute as @e[type=experience_orb,distance=..10] run say hi (should only print 1 "hi")

Plugin and Datapack List

none

Paper version

f9f90791e43f396ed12be5e0e8867691fc87dbe7

Other

No response