E1: E17: Email notification problems in Case Management with Asignee and Group provider

Hello dears, I have a problem with CRM module 17 for emails in case management P90CG504 (P17500).

1. When generating a case, the emails for the group provider work, but if I add the Assignee there, it is only sent to the Asignee person and ignores the Group provider…
   

Example in a case:

Note that in the email, when I also included the assignee in the case, only sent one email there, no other email arrived to the distribution list of group provider...

Thanks!

(I have also not been able to find the message flow of the data glossary (Y) (from the group provider and the one from the assignee)