Loss of transparency with service in ArcGIS Pro

[Anonymous User]

We use a publicly available map service (see below) with a 70% transparency in our maps in ArcGIS Pro (2.7.2).

In ArcGIS Pro the transparency for the service works, but sometimes the transparency will be lost and will draw at 0% transparency even though a transparency for the layer is still set to 70%. 

It is very inconsistent and I can't find a pattern. It seems to happen more often when there are other layers in the map. I can't get this to happen when the service is the only layer in the map. So, I am coming here to see if anyone else has experienced this issue?

Below is the service we use and the steps we use to add it to a map in ArcGIS Pro.

https://elevation.its.ny.gov/arcgis/rest/services/NYS_Statewide_Hillshade/MapServer

1. In a map in ArcGIS Pro>Add Data drop down> Add from PATH/URL
2. Add the URL above
3. Select the Group layer: NYS_Statewide_Hillshade
4. Open the Layer/Appearance tab in ribbon
5. Set Transparency to 70%

Thanks in advance!

Supriya

[ABishop]

Did you address this with ESRI Support?  Or search for a BUG log on this version of ArcGIS Pro 2.7.2 and issues with transparency loss in basemap services?