setting barbuttonItems cuts off icon

[MartinP7r]

When I set a navigation bar like below, the icon gets cut off.

let settingsBarButton = UIBarButtonItem()
settingsBarButton.setIcon(icon: .emoji(.gear), iconSize: 30)
navigationItem.rightBarButtonItems = [settingsBarButton]

Not sure what's wrong since the example in your readme also uses size 30.

edit:
setting it via

settingsBarButton.image = UIImage(icon: .emoji(.gear), size: CGSize(width: 30, height: 30))

works fine