When using ViewportUV in the UserInterface material, it flips upside down on an Android device

Development Rendering
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I created a material like this.

343574-before001.png
343574-before001.png1704×557 131 KB

There was no problem when running it on Windows and iOS, but when running it on Android(Galaxy S9), the display is flipped upside down.

343576-before002.png

Therefore, as a result of such an implementation, it was displayed correctly on Android.

343579-after001.png
343579-after001.png2331×849 242 KB

343580-after002.png
343580-after002.png1758×470 103 KB

But I have doubts.

  1. Is the Galaxy S9 the only problem like this? Or does it occur on other Android devices?
  2. Do you know why you flip it upside down? I’m scared to implement it for no apparent reason.

Thank you.