Integration: Issue importing mobile numbers from Apollo

[amangels]

We've been using Apollo for our contact information enrichment and have run into an issue with importing mobile or direct numbers. When we request the direct dial and push the number into HubSpot, it also overwrites the Phone Number that is listed in HubSpot.

I confirmed that our field mapping is correct within Apollo - each phone number option (Phone, HQ, Mobile) is mapped correctly to different fields within HubSpot. However, every time I push the mobile number from Apollo into HubSpot, the number writes into the Mobile Number field AND overwrites any existing Phone Numbers the other field.

Has anyone encountered this before, or have a solution?

Thanks!