Device screen unreal blinking and flickering

Hello! I have problem! Device " Sony Xperia SP C5303 “(engine recognized device profile as " Adreno 320-Mid” im try set profile Mid to Low, but its not solved the problem).The screen flickers /blinks when you play the levels (i use only unlit materials(im not use any light source). Camera set in Ortho (2d game but in 3d world, and game very very simple)). Widget render its okay. This problem only in this device. Another smartphone Lg Fino and two tablets work fine.
Please help with investigation and solving this problem.Thanks.
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