Why can't the camera be displayed in full screen when called by a third-party app on the REDMI Pad 2 Pro?

When accessing the camera on my REDMI Pad 2 Pro through a third-party app, the screen will not display full screen. This issue is primarily due to compatibility issues when the third-party app is first installed and accessing the camera, and is not a hardware or system malfunction of the tablet itself. Re-enabling the app usually restores normal display.
If the camera does not display full screen in a third-party app, please refer to the following troubleshooting steps:
  1. Exit and re-enable the relevant third-party app.
  2. Check that the app is the latest version; if an update is available, please update it immediately.
  3. Clear the app's cache and data in the system settings and try again.
  4. Restart the device and then open the third-party app again.
  5. Confirm that the app has permission to use the camera.
  6. If the issue persists, uninstall and reinstall the app.
  7. Try using the system's built-in camera or another app with better compatibility.