Zoom in mobile scroll stops working

[gabifuse]

Hello I have a basic usage of the scrollbar wrapping an img element.
If opening this in a mobile phone and zooming into the image scrolling in any direction except down (for some reason) doesnt work.

Im guessing this because the wrapper div now doesnt think there is an overflow and the scroll is somehow blocked.

Any idea how to approach this?

Thanks in advace,
Gabi.