To reproduce:

1.Download and open attached "Smart2VR.zip" project
2.Build the project to a device.
3.Open the application via DayDream Library.
4.Activate DayDream controller.
5.When App loads with the daydream controller press on "Office Smart2VR | Netherlands" window which is at the top center.
6.Then double click(select) the first image in the slide show which is called "Buiten" or any other image from the available ones.
7.Observe visual artifacts.

Expected result: After opening the image it is displayed without any visual artifacts.
Actual result: After opening the image it has 2 black lines distorting the screen.

Reproduced with 5.6.0p1,5.6.0p2.
Not reproduced with : 5.6.0b3.

DUT:

Google Pixel XL, OS:7.1.1, CPU:arm64-v8a, GPU:Adreno (TM) 530, Build:google/marlin/marlin:7.1.1/NMF26U/3562008:user/release-keys

Google Pixel, OS:7.1.2, CPU:arm64-v8a, GPU:Adreno (TM) 530, Build:google/sailfish/sailfish:7.1.2/N2G47E/3766409:user/release-keys

Notes: Tried testing on 2017.1.0b1 but since there were compatibility problems, after building application to device the Image did not display at all. 5.5 has no Daydream compatibility. App refuses to show anything on some versions such as 5.6.0f1, 5.6.0f3.