Steps to reproduce:
1. Create a new Unity project
2. Go to Project Settings > Player > Android > Resolution and Presentation
2.1. Enable "Resizable Activity"
2.2. Enable "Render outside safe area"
3. Build and run on an Android device
4. Put the app into multi-window (split-screen) mode
5. Drag the divider to change the split ratio of the screen

Actual result: Additional white/black bars appears either at the top or at the edges of the screen, depending on the orientation
Expected result: The Player fills the entire area of the screen that it is given

Reproducible with: 2023.1.0a3, 6000.0.69f1, 6000.3.11f1, 6000.4.0b11, 6000.5.0a8

Built on: Tahoe 26.3 (25D125)

Reproducible with these devices:
VLNQA00642 - Google Pixel 9a (Pixel 9a), CPU: -, GPU: Mali-G715, OS: 15
VLNQA00319 - Google Pixel 4 (Pixel 4), CPU: Snapdragon 855 SM8150, GPU: Adreno 640, OS: 13

Not reproducible with these devices:
VLNQA00367 - Galaxy Z Fold2 5G (SM-F916B), CPU: Snapdragon 865 SM8250, GPU: Adreno 650, OS: 10
VLNQA00531 - OnePlus OnePlus 11 5G (CPH2449), CPU: Snapdragon 8 Gen 2 (SM8550), GPU: Adreno 740, OS: 13

Notes:
- User has reproduced on these 2 devices Google Pixel 7a (Android OS 16, API 36), Google Pixel 6a (Android OS 16, API 36)
- To get into multi-window mode, open app carousel → press on app icon → press “Split screen”