As a test, I created a simple custom page with only one text field and some static text. When I preview the page, I can see the text. However, when I launch the custom page from the app as a modal dialog, I only see the title of the modal.
Here is the code:
let pageInput = { pageType: "custom", name: "effectivedate_12f18" }; let navigationOptions = { target: 2, position: 1, width: {value: 50, unit:"%"}, title: "Effective Date Change" }; Xrm.Navigation.navigateTo(pageInput, navigationOptions).then( function success() { //test }, function error() { } );
This is what I see from the preview:
This is what I see from the app: