Steps to reproduce the issue
Start Minecraft Java Edition 26.3 Pre‑Release 1 on Windows 11
Switch your keyboard layout to Sogou Chinese input‑method
Go into video settings and enable Exclusive Full‑Screen mode
Enter a world, then press W / A / S / D to move around
Expected result
Only the Minecraft game receives WASD keyboard input. The Chinese input‑method will not pop‑up, and no brief black screen flash appears, exactly like the normal behaviour in version 26.2.
Actual result
The player character moves normally. However WASD keystrokes are also sent to the Sogou input‑method, which brings up the text candidate box, and a short black‑screen flash occurs right after pressing movement keys, interfering with gameplay.
Environment
Operating System: Windows 11 24H2 CPU: i5‑12500 Input‑method: Sogou Pinyin Chinese Input
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