User Delete successful but User still there if assigned to the Sophos Connect

Noticed a bug with user deletion when using Sophos Connect. If a user is assigned to the Sophos Connect and you try to delete the user it will say the deletion is successful but the user is still there.

Reproduce by:

1. Assign user to Sophos Connect
2. Go to Authentication > Users
3. Delete the user in step 1 either via checkbox or bin icon
4. Success message appears
5. Page refreshes with user still there
6. Unassign user from Sophos Connect
7. Perform steps 2-4 but this time the user will be deleted.

Emile