What is wrong with my rendering on Android?

I managed to run UE4 project on my HTC ONE X but get weird image on intersecting polygons.

It looks like there is problem with z-buffer but I might be wrong.

Is this normal on mobile platform or are there settings that need to be changed?

Any ideas? Thanks.

Screenshot:

(The smaller boxes have emisive material and the bigger ones have unlit material)

Hello,

Thank you for your report. We were not able to investigate this on the engine version you reported, but there have been many version changes to UE4 since this question was first posted. With a new version of the Engine comes new fixes and it is possible that this issue has changed or may no longer occur. Due to timetable of when this issue was first posted, we are marking this post as resolved for tracking purposes.

If you are still experiencing the issue you reported in the current engine version, then please respond to this message with additional information and we will investigate as soon as possible. If you are experiencing a similar, but different issue at this time, please submit a new report for it.