FYI: Polygon Feature Selection in Pro

[MichaelMiller8]

Thought this may be helpful to some.  

It seems that Pro will not select a single hollow (no fill color) polygon by selecting in the interior of the polygon. It will select multiple polygons if you run the selection tool over a boundary.

Selection works fine with filled polygons.

[DanPatterson_Retired]

That is a 'bug' and should be reported if that is the case, since it will affect the results of manual selections 

[Robert_LeClair]

What release of ArcGIS Pro are you using?  I'm running 1.3.1 and can select a hollow fill polygon with the select tool clicking in the middle of the polygon.

[MichaelMiller8]

10.3.1 here. Had a good conversation with support and understand what

happened. Will forward our discussion when I get home. Thanks for your

help!!