Unable to use a published web tool if map contains a raster layer

[YvetteFell]

ArcGIS Pro v2.6.2

Enterprise 10.71

Whenever I share a GP result from a custom Python script as a web tool to Portal / ArcGIS Enterprise, if the map contains a raster layer the resulting web tool has no tasks / tools (publishes successfully, no errors or warnings after Analyze)

If I take the raster layer out, run the tool again then republish, the expected task appears

The nature of my custom Python script requires the ability to interact with a variety of different layer types within a map, rasters included.

To take anything to do with my script out of the equation, I decided to do a test using a built-in GP tool:

1. New project > Added a raster layer to a map
2. Raster is within an enterprise geodatabase which is registered with the target portal
3. Ran Raster to ASCII
4. Right click result in History > Share Web Tool
5. Filled in mandatory web tool details
6. Analyze > No errors or warnings
7. Publish > No errors or warnings
8. Clicked on link to mange the web tool
9. On the web tool's details page, no tools a listed under the Tools section

Based on the above it seems a bug in ArcGIS Pro?

Would appreciate any insight anyone can offer.