Vendor role

Hi,
I have this issue:
if a user has the role lp_teacher and is author of a custom post type (learnpress course), he can see, inside his dashboard so in the admin menu, Learnpress Courses section. And inside Courses page he can see only his courses correctly.

But if a user that have role lp_teacher, but has also another role (in my case your “Vendor” role; so I created a Vendor profile and assigned that user).
Now the user can’t see Learnpress Courses section.

I tried to manage roles and capabilities with AAM plugin, and I also tried to assign all capabilities that have lp_teacher role to Vendor role, but nothing changed.

How work your “Vendor” role? How to fix this?