OpenGL ES 2.0, Polygon Offset ignored on some devices

Hi! Sorry for my English)

Have trouble with one device - Huawei Ascend P6 with Android 4.4.2.
I set polygon offset, but on rendering it just ignored, frames look like polygon offset turned off. On many another devices with android 4-7 the same program works correctly, problems only on Huawei P6. glIsEnebled(GL_POLYGON_OFFSET_FILL) return true, tried to use different unit and factor values, but its not chsnge anything. Is that possible that polygon offset does not realize in GPU? Is there any way to detect this problem in runtime? Or maybe for some devices i have to do smth else glEnable?

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