Owl breaks firefox vertical centering

[EEKimS]

I have noticed that on many sites that have vertically centered popups or galleries, when owl is active it breaks these layouts and vertically centers to the body of a page instead of the viewport.

This may be something that is inevitable with how the plugin works, but it is annoying that i can only close some of those popups by using the inspector and deleting the divs.

example site that breaks layout when Owl is active: https://photoswipe.com