Issue Let's Encrypt not renewing webmail & mail

[Wyrix]

When a Let's Encrypt certificate is being renewed, only the certificate of the website (https) is renewed. For mail & webmail the old certificate is still used and when that certificate expires, Plesk tells me that Mail access & Webmail access are not secured. I can reselect the new certificate than in Plesk and it works again as it should be.

But why is Plesk not automatically renewing my webmail & mail certificate? Now I should have a look every day for all domains to check if mail is still secured and if not, reselect the certificate for mail & webmail.