Steps to reproduce:

1) Download attached project 'HelloWorld Unity 5.5.3.zip' and open in Unity
2) Build and Run project on a device
Check transition between Static Splash Image and first scene, you should notice black frame between them(check attached video 'BlackFrame.mp4')

Expected result: No black frame between Static Splash Image and first scene
Actual result: Black frame between Static Splash Image and first scene

Reproduced with:
5.6.0b3, 5.6.0p3, 2017.1.0b2

Not reproduced with:
5.5.3p2, 5.6.0b2

Regression from:
5.6.0b3

DUT:

Samsung SM G925F (Galaxy S6 Edge), OS:6.0.1, CPU:arm64-v8a, GPU:Mali-T760, Build:samsung/zeroltexx/zerolte:6.0.1/MMB29K/G925FXXU5DQA7:user/release-keys

HUAWEI EVA L19, OS:7.0, CPU:arm64-v8a, GPU:Mali-T880, Build:HUAWEI/EVA-L19/HWEVA:6.0/HUAWEIEVA-L19/C432B182:user/release-keys

Google Pixel C, OS:7.1.1, CPU:arm64-v8a, GPU:NVIDIA Tegra, Build:google/ryu/dragon:6.0.1/MXB48J/2452629:user/release-keys