Does anyone know why this is happening and how to solve it?
Hi @Colin Edgar
Best if you can check directly with our official Support - they can check the Deal ID, Person, emails, etc, all the necessary details. In general, in Pipedrive automatic email linking is based on the email address and the Contact Person. It will auto-link to a deal if this Contact person has 1 open deal/lead/project. But check your specific case via in-app chat or email [email protected] to learn more. Thanks!