Description 

In the current Minecraft Java Edition snapshot, when using a Chinese input method (IME), pressing movement keys (WASD, Space, Shift, etc.) triggers the IME candidate selection box to appear on screen. The player’s movement itself is not affected – they can still walk and turn normally – but the frequent pop‑up is highly distracting and breaks immersion.

This issue does not occur in the stable release 26.1.2 (used as reference), where the IME stays hidden during movement and only activates when text input is explicitly requested (e.g., in chat).

Steps to Reproduce 

1. Launch the latest Minecraft snapshot.

2. Set your system input method to a Chinese IME (e.g., Microsoft Pinyin, Sogou, Rime, etc.).

3. Enter a world (single‑player or multiplayer).

4. Press any movement key (WASD, Space, Shift) while the game window is in focus.

Actual Result 

The IME candidate input box appears each time a movement key is pressed, though the character moves correctly.

Expected Result 

No IME pop‑up should appear during movement – exactly as in release 26.1.2.

I have attached two videos for reference.The first video is version 26.1.2, and the second video is the latest snapshot version.