I'm trying to load a Wgs84 based basemap and display it in a SceneView.
For example, trying to use this basemap: http://services.arcgisonline.com/arcgis/rest/services/ESRI_Imagery_World_2D/MapServer
My code looks like this:
<SPAN class="keyword token">var</SPAN> server <SPAN class="operator token">=</SPAN> <SPAN class="keyword token">new</SPAN> <SPAN class="token class-name">Uri</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="string token"><SPAN>"</SPAN><A class="jive-link-external-small" href="https://community.esri.com/external-link.jspa?url=http%3A%2F%2Fservices.arcgisonline.com%2Farcgis%2Frest%2Fservices%2FESRI_Imagery_World_2D%2FMapServer" target="_blank">http://services.arcgisonline.com/arcgis/rest/services/ESRI_Imagery_World_2D/MapServer</A><SPAN>"</SPAN></SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="keyword token">var</SPAN> sceneLayer <SPAN class="operator token">=</SPAN> <SPAN class="keyword token">new</SPAN> <SPAN class="token class-name">ArcGISTiledLayer</SPAN><SPAN class="punctuation token">(</SPAN>server<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="keyword token">await</SPAN> sceneLayer<SPAN class="punctuation token">.</SPAN><SPAN class="token function">LoadAsync</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
myScene <SPAN class="operator token">=</SPAN> <SPAN class="keyword token">new</SPAN> <SPAN class="token class-name">Scene</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">new</SPAN> <SPAN class="token class-name">Basemap</SPAN><SPAN class="punctuation token">(</SPAN>sceneLayer<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="line-numbers-rows"><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN></SPAN>
Yields a blank globe.

This same map loads and displays fine on a MapView.
Also, if I use a WebMercator based map like this: http://services.arcgisonline.com/arcgis/rest/services/World_Imagery/MapServer
both the MapView and SceneView are fine.
Any help?