Hello, everyone. I recently came across this problem I have and I think its related to the build settings. So I’m using different sprites for backgrounds depending on the menu, one of them looks like this 
, but whenever I run it on mobile device it is all black. Here’s info about the img: Filter mode: Bilinear, Format: True color, Max size: 1024/2048
What shader are you using for your Sprite? I experienced similar issues while applying shaders that are not “Mobile Friendly”. Usually Shaders have a default “fallback” shader, when they’re not able to render as in design, they go for the fallback one. Have you tried using a different shader?. I believe there are a group of shaders on unity that are special for mobile.