Hi,
I've created a project with default permission scheme and I've assigned the permission role "Developers" to a group called "business" with 3 users, Alessandro and Simone (that are admins too) and Francesca.
Now Alessandro can assign issues to himself, Simone and Francesca, but Francesca can assign only to herself and to Alessandro, while Simone can assign issues only to himself.
What's up? I've tried all I know!