I was having problems with one of my screens which was not rendering correctly on the iPad.
I created a sample app that is not rendering correctly on an iPad. It works perfectly on windows desktop.
It has a gallery within a gallery and a slider to provide the scrolling so that all the sub-galleries scroll simultaneously. But the gallery which moves across the page - some lines go under the first column (which is correct behaviour) but some go over the top - that's bad.
It works ok if there are only a few lines and the outer gallery's scroll bar is not visible. But if you add more records so that outer gallery's scroll bar appears - that's when the problem occurs.
I have also attached a video that demonstrates it on a sample app. (woops, can't upload here - here's a link
I also attached the exported app.
I hope you can help.
See if this what you need