We can't seem to get our Articulate Storylines to work well in the Canvas app. We're hosting them on an external server and embedding them in the courses with iframes. This works well on desktop, but on mobile they don't fit in the screen--they extend to the left and right of the screen. I know enough about iframes to be dangerous but not to troubleshoot. Do I need to change my settings or does it just not work great with the mobile app?