UI Elements Not Rendering Properly on Android

In my game, UI elements not rendering properly on an Android device.
But it working properly within Unity Editor.

Here is the example of this problem I am facing:

I have purchased old source code and then upgraded its source code to Unity 2018 version.
I have implemented a Canvas based UI system from scratch and completed all UI screens.

At last, I have run the game in actual Android device but I was shocked by getting above result.

I have checked all things as per my knowledge but all properties values are proper.

So please give me some suggestion to correct above problem.

Not Sure But Use Unlit\Texture shader.