Power Apps - Customised SharePoint List Form - Display Size

Hi guys,

I am using Power Apps to customise a SharePoint Online List Form. I have changed the form display size from portrait to landscape (large).

The problem I have is that whenever I edit and save the Power App, the form displayed on the list reverts back to portrait. Despite is still being set to landscape on the Power App.

The only way I seem to be able to resolve this is to clear the cache on my browser (MS Edge) every time I edit the form in Power Apps. Whilst this does result in the landscape sized form re-appearing on the list, it is obviously very frustrating to have to do this every time I edit the form.

Has anyone else come across this? Or am I missing something obvious/doing something wrong?

Thanks in advance.