Short description of the issue

When using crosshair touch control, after triggering infinite‑brushing glitch with brush, switching hot‑bar to other building blocks makes them auto‑place blocks, even onto air.

​Steps to reproduce the issue

1. Set touch control to crosshair mode.

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2. Put brush in hot‑bar.

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3. Aim at a block and tap attack button once, brush enters infinite brushing state.

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4. Switch hot‑bar slot to another slot with building blocks.

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5. New item continuously places blocks automatically, can place blocks onto air.

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6. Tap attack button once again to stop this auto‑placing behavior.

Expected result

Auto‑brushing state should end after switching items. Other items should not inherit auto‑place state.

​Actual result

After switching hot‑bar, building blocks keep auto‑placing, blocks can be placed in air. This glitch works in both Survival and Creative mode.

Game internal version: 1.21.132