Galleries not displaying correctly

Hi, I’m having a couple of issues with the way galleries are being displayed.

When I use the Classic Layout on a mobile device in vertical orientation, the images don’t display when selected and the page freezes. I think the image is being displayed off the screen. They will only display if the device is turned horizontally.

When using the Folio Layout on any device, the image being viewed has the bottom cut off by the filmstrip at the bottom of the page when it is larger than the area about the filmstrip.

The mobile issue is a particular problem so I’d be grateful for any help with that.

Thanks
Robert