How to reproduce:
1. Open attached project
2. Build to device with Adreno 540 GPU
3. Inspect visual artefacts that are caused by non-standard camera viewport rect

Default: X: 0, Y: 0, W: 1, H: 1 - Works as expected
Modified: X: 0.1, Y: 0.1, W: 0.8, H: 0.8 - Catastrophic visuals

Reproduced on: 2017.2.0b2, 2017.2.1p1, 2017.3.0p1, 2018.1.0b1
Not reproduced on: 2017.1.3f1, 2017.2.0b1

Devices under testing
Reproduced on:
Razer Phone, OS:7.1.1, CPU:arm64-v8a, GPU:Adreno (TM) 540, Build:razer/cheryl/cheryl_ckh:7.1.1/NMF26X-CKH-171108/853:user/release-keys
Samsung SM N950U1, OS:7.1.1, CPU:arm64-v8a, GPU:Adreno (TM) 540, Build:samsung/greatqlteue/greatqlteue:7.1.1/NMF26X/N950U1UEU2BQK1:user/release-keys

Not reproduced on:
Samsung SM G930F, OS:7.0, CPU:arm64-v8a, GPU:Mali-T880, Build:samsung/heroltexx/herolte:7.0/NRD90M/G930FXXU1DQJ3:user/release-keys
Samsung SM G950F, OS:7.0, CPU:arm64-v8a, GPU:Mali-G71, Build:samsung/dreamltexx/dreamlte:7.0/NRD90M/G950FXXU1AQI7:user/release-keys