Resizing the game window in Minecraft also resizes it in Minecraft Preview, and vice-versa

Summary:
When the player changes the window size of either Minecraft or Minecraft Preview—such as by resizing the window or maximizing/unmaximizing it—the same changes are applied to the other app. Since the two apps are separate installations, this shared behavior is unexpected. Additionally, switching one app to fullscreen does not switch the other to fullscreen, further highlighting why this behavior is unexpected.

Steps to Reproduce:

1. Launch both Minecraft and Minecraft Preview.

2. Switch each app to Windowed mode by pressing F11 or disabling Fullscreen in Settings > Video.

3. Close one of the two apps and leave the other running.

4. Unmaximize and/or resize the open app’s window.

5. Close the app.

6. Launch the other Minecraft app.

7. Observe the window size.

Observed Results:
Adjusting the window size in one Minecraft app also changes the window size in the other.

Expected Results:
Because Minecraft and Minecraft Preview are separate apps, each should maintain its own independent window size settings.