Internal contact ID displays in search listing but not in profile view

I created a profile with the Internal ID field as one of the viewable/searchable items. When I do a search from the front end, I see the data for all of the fields in the profile such as name, last name, email, and Internal ID (renamed member number) in the listings; however, when I click 'view' next to a listing, and see the profile view, the Internal ID data is conspicuously absent though the label is there. All other fields except Internal ID (member number) display properly in the profile view.

I was able to reproduce this on the demo site.