I created a web scene using feature layer, elevation layer and raster tile layer (aerial image). All stored within my online arcGIS content. Tiles were created from raster data in projection different than WGS 1984 web mercator, with selected by me scales. Everything displays fine in web scene. I then attempted to create a web app using a template, I selected a simple scene viewer. When I view app, I can see that elevation data is there, and my vector features, however the aerial image does not display. Application acts like it is there, there is a button to turn it on and off (however it doesn't display even when it is turned on). I am wondering why is that and how to fix it.