How to reproduce:
1. Open the "VideoIssue" project and build it for Android
2. Press "Play Video" button in the blue background

Expected result: Video is loaded, "Play Video" button and the blue background is not seen before the Video is played
Actual result: Screen flickers before showing the video (blue background and the button is shown)

Reproducible with - 2018.1.0b1, 2017.3.0f3, 2017.2.1f1, 2017.1.2p4, 5.6.4p2

Devices tested:

Reproducible with:
Google Pixel, OS:8.0.0, CPU:arm64-v8a, GPU:Adreno (TM) 530, Build:google/sailfish/sailfish:8.0.0/OPR3.170623.007/4286350:user/release-keys
Samsung SM N950W, OS:7.1.1, CPU:arm64-v8a, GPU:Adreno (TM) 540, Build:samsung/greatqltecs/greatqltecs:7.1.1/NMF26X/N950WVLS2BQK1:user/release-keys
Samsung SM G928F, OS:7.0, CPU:arm64-v8a, GPU:Mali-T760, Build:samsung/zenltexx/zenlte:7.0/NRD90M/G928FXXU3CQG2:user/release-keys
Xiaomi MI 5s, OS:6.0.1, CPU:arm64-v8a, GPU:Adreno (TM) 530, Build:Xiaomi/capricorn/capricorn:6.0.1/MXB48T/V8.0.10.0.MAGCNDH:user/release-keys
Lge LG D855 (G3), OS:5.0, CPU:armeabi-v7a, GPU:Adreno (TM) 330, Build:lge/g3_global_com/g3:5.0/LRX21R.A1445306351/1445306351:user/release-keys
Samsung SGH T999, OS:4.3, CPU:armeabi-v7a, GPU:Adreno (TM) 225, Build:samsung/d2tmo/d2tmo:4.3/JSS15J/T999UVUEOH1:user/release-keys

Note: Couldn't reproduce with - iPhone 7+ iOS 10.3.2

Fixed in - 2018.2, backports are coming to 2018.1, 2017.3, 2017.2