Hey there!
It happens many times (but not always) that when I load my app with the Bubble Go app (on Android), many elements with a style (ex: background color & borders) doesn’t show up correctly. But when you tap on them, then the correct style appears. But not from scratch, you need to tap them after the first load to be able to see them correctly.
I didn’t tried on IOS, just with the Bubble Go on Android device.