Using ArcGIS Pro 2.2.0 I created and published a new web layer from a raster layer which was stored in a geodatabase. The raster layer has 2 values which are either a 1 or no value. In ArcGIS Pro the no value cells are symbolised as no colour so that those cells are invisible. This displays as expected in Pro. However when I load the newly created Tile Layer into the AGOL Map Viewer the invisible (no data) cells have become white which obscures all the the underlying map layers.
Can anyone help with issue please.