Contact roles bug?

THIS "BUG" IS RELATED TO B2C CUSTOMIZATIONS ONLY

1. I create an opportunity
2. I try to add "contact roles" to this opportunity
3. No contacts are found :(

4. Now I go inside a "Contact"
5. I link this contact to an "Account".

6. I go back to the opportunity, link it to the account
7. I can now add the "Contact Roles"

----> Therefore, the "bug" is that under a B2C use of Zoho CRM it is impossible to use the Contact Roles as is. Any workarounds?