It appears there was an update in July that when the preferred name settings were consolidated into one section, resulted in the checkbox settings not working the way they used to.

In our testing, with "Users can edit their name" unchecked and "Users can edit their profile" checked, students are not able to edit just their Display name under Profile settings. When "users can edit their name" is also checked, the user then has the ability to change their Full Name, resulting in Grades not matching SIS.  I'm sure you can see this would be problematic. 

Anyone else seeing this issue or heard of it before?