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.