Spear jab attacks do not connect properly after connecting a charge attack on paper servers

[SeaOfPixels]

Expected behavior

Confirmed by PvP Legacy developer BlueBandit.
Expected Behavior:

Minecraft.1.21.11.-.Multiplayer.LAN.2026-04-28.19-06-13.mp4

Observed/Actual behavior

Observed Behavior:

Minecraft.1.21.11.-.Multiplayer.3rd-party.Server.2026-04-28.18-40-59.mp4

Steps/models to reproduce

1. Load a paper server
2. Attempt to jab attack after a charge attack connects
3. Observe the differing behavior from vanilla, and how the jab attack whiffs unless u wait ~1s

Plugin and Datapack List

No plugins/datapacks

Paper version

Latest build paper 1.21.11 build #130

[B1ue-Bandit]

In addition to what he said, jab attacks always deal knockback even through damage ticks on vanilla.

[SeaOfPixels]

Connecting charge attacks repeatedly in the offhand also keeps stopping your sprint, which does not happen in vanilla either.

[B1ue-Bandit]

Connecting charge attacks repeatedly in the offhand also keeps stopping your sprint, which does not happen in vanilla either.

This is not the case, he was just confused by something else. Anyways I'm looking into potential fixes.