Undesired border around ion-button

Hello guys,

Im using ion-button component and i changed its default border radius. Everything is fine with button until i put some type on it. Example if i set its type to submit or button it will get some border around it and i dont know where this is comming from. Also when i view application in web there is no such border but when i open it in my android phone there is this border i dont want.

Any ideas? I searched google but i only get solutions for removing border when button is active but this is not case in my problem.

Has anyone experienced this?