BlockBreakEvent missfires when player in adventure mode switches item in a last tick

[Darwin1546]

Expected behavior

BlockBreakEvent should be cancelled if block wasn't actually broken.

Observed/Actual behavior

BlockBreakEvent fires when player in adventure mode switches item in a last tick while breaking a block,

2026-07-09_01-40-39.mp4

look in the chat

Steps/models to reproduce

1. Set gamemode to Adventure
2. /give @p minecraft:wooden_shovel[can_break={blocks:["minecraft:sand"]}] 1
3. Start breaking a sand and press F on a last tick

Plugin and Datapack List

none

Paper version

This server is running Paper version 26.1.2-74-ver/26.1.2@e4e17fc (2026-07-06T16:51:09Z) (Implementing API version 26.1.2.build.74-stable)

Other

Any chance of backporting the fix to 1.21.11? 👉👈

[JavierFlores09]

The issue is kind of weird from my tests:

BBE-misfire.mp4

as you can see, it takes a few seconds for the BBE to be incorrectly triggered, and switching back to the correct item instantly triggers the BBE properly. I think this has to do with lag compensation, but I am not too sure. Anyhow, I made a PR attempting to fix it so we'll see what the team thinks about it: #14044