Was hoping some minor changes and clicking Back to SharePoint would shake something loose, no luck, tested on Communications site in IE and Chrome. Perhaps an invalid reference in SharePointIntegration? Looks pretty straight-forward, and my form names are as shown; FormNew1, FormEdit1, FormView1.
SharePointIntegration
OnNew:
Set(SharePointFormMode, "CreateForm"); NewForm(FormNew1); Navigate(ScreenNew, ScreenTransition.None)
OnEdit:
Set(SharePointFormMode, "EditForm"); EditForm(FormEdit1); Navigate(ScreenEdit, ScreenTransition.None)
OnView:
Set(SharePointFormMode, "ShowForm"); ViewForm(FormView1); Navigate(ScreenView, ScreenTransition.None)