Chinese Input Candidate Window Not Showing in Fullscreen Mode (Taiwan Zhuyin Input Method)

Steps to reproduce the issue:

1. Set your system input method to Taiwan Zhuyin (e.g., Microsoft Bopomofo).

2. Launch Minecraft and switch to fullscreen mode (F11 or via settings).

3. Open any text input field in the game (such as chat or command input).

4. Start typing Chinese and try to select characters from the candidate list.

Expected result:
The candidate window should appear near the text input area, allowing the player to select the desired Chinese character.

Actual result:
In fullscreen mode, the candidate window does not appear at all, making it impossible to select or input Chinese characters properly.

Note:
If the game is not in fullscreen mode, the candidate window does appear — but it is displayed at the top-left corner of the screen instead of within the game interface.