IonicPopup changes sideMenu rightBorderWidth

When my app displays a popup with ionic the right border of my sideMenu (on the left side) becomes thicker (i would guess it is about 3px). I don’t have this problem in the Nexus5 Emulator. I’m using a Samsung S6 Edge+. When I don’t show any popups the right border of the sideMenu is thin (I think 1px and color:light-grey).

Is there a way to change the CSS in order to maintain the thin rightBorder of the sideMenu when I show a popup?
And why does a popup change the width of the right sidemenu-border - is this a bug?

I am facing the same issue as well, popup or modal will make the right border of sidemenu thicker, only happen in real device, did you managed to fix it?