Extent changing in ArcGIS Pro when shapefile added to map which only had basemap?

Using ArcGIS 10.3 for Desktop:

In ArcMap:

• Open a Blank Map


• Add Basemap of Imagery (but any basemap will do)


• Zoom to Australia (but any area will do)


• Add the countries shapefile from Natural Earth (but any shapefile that covers an area much larger than where the basemap has been zoomed to will do)


• Notice how the extent does not change which to me is the expected behaviour

In ArcGIS Pro:

• Create a project using Map.aptx


• Change the Basemap to Imagery (but any basemap will do)


• Zoom to Australia (but any area will do)


• Add the countries shapefile from Natural Earth (but any shapefile that covers an area much larger than where the basemap has been zoomed to will do)


• Notice how the extent changes to become the extent of the shapefile that was just added

I think the software behaviour observed in the last dot point is a bug, and am wondering if anybody has already reported this and has a bug (NIM) number that can be used to track its resolution?