Random texture fragments remain on screen after exiting fullscreen mode in 26.3 snapshot 2

Description

Random texture fragments remain on screen after exiting fullscreen mode in 26.3 snapshot 2

Steps to reproduce

1. Launch Minecraft 26.3 snapshot 2 in windowed mode.

2. Enter a world (singleplayer or multiplayer).

3. Press F11 (or use the video settings button) to switch to fullscreen mode.

4. Wait 2–3 seconds for the display to fully settle in fullscreen.

5. Press F11 again (or use the button) to switch back to windowed mode.

Observed Result

• After reverting to windowed mode, random visual artifacts appear on the screen.

• These artifacts consist of incorrectly placed texture fragments (e.g., parts of the hotbar, UI elements, block textures, or skybox patches) drawn outside their intended positions, sometimes overlapping the game view or the debug overlay.

• The artifacts persist until the player resizes the window manually, reloads resources (F3+T), or restarts the game.

• The issue does not occur if the player never enters fullscreen, or if they remain in fullscreen mode.

Expected Result

• When switching from fullscreen back to windowed mode, the game window should render cleanly with all textures correctly mapped to their proper positions.

• No stray texture fragments or corrupted screen regions should appear after the display mode change.

• The visual output should match the state prior to entering fullscreen.