How to know from which number a missed call came, if the caller has multiple numbers?

Seems like a bug introduced in IOS 9

To me this seems like a bug introduced in IOS 9 that should get fixed automatically in future.

For outgoing calls, it continues to highlight in blue the specific number among multiple numbers in the contact on pressing ⓘ in the recent contact list.

For missed calls, it has stopped highlighting in blue but it still continues to show the label (like iPhone, mobile etc. ) for the missed call number on the main screen having all recent calls.

The specific 'sub-contact' shows directly beneath the contact's name in the call history; same whether you answered it or missed it.

Even if your contact has several numbers in the same category [some of my company contacts have several 'mobile' tags] the phone knows which one of those called.

Simply tapping the caller in the list will dial that number, which is far quicker than the old method of finding the correct one in another list, accessed by the ⓘ button.

Screen shot shows a call from a contact's "mobile" number: