Steps to reproduce:

1. Create and open a new URP 3D Project
2. Open Edit > Project Settings > Player
3. Expand "Splash Image" section
4. Preview the splashscreen (observe the gradual fade into the first scene)
5. Build and run the project
6. Observe the splashcreen

Actual results: The splashscreen snaps to the first scene

Expected results: The splashscreen gradually fades into the first scene (matches the preview)

Reproducible with versions: 2023.1.0a10, 6000.0.73f1, 6000.3.14f1, 6000.4.4f1, 6000.5.0b5, 6000.6.0a3

Reproducible on: macOS Sequoia 15.7.4 (M1), macOS Sequoia 15.7.4 (intel), macOS 26.3.1 (M1), Windows 10, Windows 11, Ubuntu 24.0.4
Reproducible on {}devices{}{}:{} 
VLNQA00644 - Oculus Quest 3S (Quest 3S), CPU: Google Tensor G2, GPU: Adreno 740, OS: 14
VLNQA00417 - Oculus Quest 2 (Quest 2), CPU: Snapdragon XR2, GPU: Adreno 650, OS: 10

Not reproducible on: macOS 26.4.1 (M3 Max), Windows 11 Switch NX 21.4.3, Switch 2 Ounce 21.4.3, Game Core - Xbox Scarlett 10.0.26100.7815, PS4 12.508, PS5 13.00
Not reproducible on devices: 
VLNQA00641 - Google Pixel 9 (Pixel 9), CPU: -, GPU: Mali-G715, OS: 16
VLNQA00634 - iPhone 15 Plus (MU0Y3QN/A), CPU: t8120, OS: 26.3
VLNQA00615, Samsung Galaxy S22+ (SM-S906B), Android 13, CPU: Exynos 2200, GPU: Ltd.

Notes:

• Seems that the reproduction is not consistent between different devices on the same platform (for example, take macOS - different devices, one reproducible, another not). This might be true for all platforms
• Reproducible on a Web build as well
• It appears that seemingly random devices are affected