I have a CRM webhook that passes data to Zoho Sign via Zoho Flow.  If CRM fields are empty, the webhook passes null values to Flow.  When the sign document is received, rather than showing empty fields, it leaves the field name in.  This makes the document look unprofessional and causes the signer to have to delete information.

Is this is a mistake I am making or is it a problem with integrating in this way?