NGUI artifacts

[ciberus]

Hello. On one device all perfect on another artifacts. How to fix this? NGUI version 3.11.4 Unity 5.6.0f3.

[ciberus]

Additional info.
Artifacts:
Meizu M3 Note(Android 5.1)
Galaxy S3(Android 4.3)
Galaxy S8(Android 7.0)
Galaxy S3(Android 4.4.2) - top nav and bot nav looks nice but cards makes artifacts.
Galaxy S5(Android 4.4.2) - same as Galaxy S3(Android 4.4.2)

Works perfect:
Nexus 2013(Android 6.0.1)

In project used this shader for masking mb it's help http://nickithansen.dk/masking-and-clipping-textures-in-unity-5-4-ngui-3-9-8/

Sorry that not in one post.

[ArenMook]

You need to make sure your first camera to draw clears color.

Yours only clears depth, if anything. This has nothing to do with NGUI.