Issue with solution explorer security

Hi,

We recently secured menu designed with the below
entry in sec. workbench during a security review project-
User / Role
Security Type Description Menu Design Menu Filtering Fast Path Documentation OMW
Logging Favorites
*PUBLIC A Solution Explorer Security 1 3 0 0 0
3

But the access was available for SYSADMIN role, below entry for
SYSADMIN role-

SYSADMIN A Solution Explorer Security 3 3 1 3 1
3


So menu designed was already enabled for the users as they were
assigned this role(SYSADMIN) but as soon as the *PUBLIC record was added, they
lost access to menu design and we had to explicitly give access to the user ids
as below-