Primary phone of type Mobile doesn't show in the Primary phone profile field

Question

When you add a field of phone type Primary in a profile for a contact, if that phone type is Mobile, it does not show appear. Contact details:

Profile field detail:

Profile view detail:

Any suggestions?

I expected to see the mobile phone number appearing in the Primary phone field. In other words, the phone type should be irrelevant; all that should matter is that it is the Primary one. If I make the type Phone as opposed to Mobile, the phone number appears in the Primary field.