CRM Sync Deleting Billing/Shipping Phone Numbers

CRM Sync Deleting Billing/Shipping Phone Numbers

My business process involves programmatically creating customers in Finance via Zoho Flow when a customer places an order on my Woocommerce site.

The customer is created as an Individual customer. This process fills out the customer information, including the phone number for the shipping and billing addresses.

I have the CRM <---> Finance sync enabled. As I understand it, if a customer is created in Finance, this instantly creates the contact in CRM, as well. That part seems to work fine.

Unfortunately, when the periodic synchronization happens, the CRM copy of the contact overwrites the Finance version. When this happens, both the billing phone and shipping phone fields are erased.

This is a problem because those fields are used in subsequent business processes.

Is there a way to prevent this from happening?