Shaun_Max Oh! yeah! in order keep the ui clean, I have to set the height of the button to 30 with font size 20;
It looks like font size 20 is different on different platforms, so you'll have to find a good combination of height and font size that works everywhere.
Then, I don't know what would cause this behavior. Most likely, it's not anything specific to Feathers. I would double-check that you are actually including your storyboard, though. I still suspect that it's missing.