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MC-298516

While running /dialog clear and /dialog show every tick, pressing the warning button just after joining the world can crash the game

Steps to reproduce the issue

  1. Create a datapack with a function which runs these commands every tick (#minecraft:tick)

    dialog clear @a
    dialog show @a {type:notice,title:a,pause:false}

    or you can use the attached datapack (bug.zip)

  2. Create a new world pre-equipped with the datapack, and join the world.

  3. A dialog screen will appear. Press the yellow warning button at the top.
    This should most likely result in a crash. If it doesn't, you can leave the game, rejoin, and try again.

The setup commands are minimal I believe. Removing /dialog clear @a did not reproduce the issue, nor did removing pause:false.

Attached a datapack for the reproduce step 1 (bug.zip), a video reproducing the issue (2025-06-04 00-10-11.mp4), and the crash report (crash-2025-06-04_00.10.47-client.txt)

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Triton365

boq

Plausible

Platform

Important

Crash

1.21.6 Pre-Release 2

1.21.6 Pre-Release 3

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