Hi Lightning Users! I was wondering if anyone else came across this?

When searching a phone number in Lightning you'll receive 0 results in the default "Top Results" page. While in Classic it'll return most, if not all records, that have this phone number in it. Since the Soft Phone behavior for Inbound calls with multiple results is to do a general Salesforce search, this could confuse users in Lightning thinking that there are no records in Salesforce with this number when the default search returns 0 records in the "Top Results" page. 

We've discovered a workaround by pinning Contacts, Opportunities, Accounts, Cases, and Leads in Classic. This will force the "Top Results" search page to display any records for those objects, but it seems like a bit of a workaround that I don't think was intended.