Group policy no longer applying to groups only Authenticated Users

In my environment I have my office separated into OUs, some offices get all the drives, so the group policy for their drive mapping is simply linked to their OU with Authenticated Users in security filtering. All these drive maps work.
In one office, there are many departments that get different drives.
I had the office OU linked, and in security filtering I had the group they were in.
This worked fine for a while, until an update or something.
All drives gone, I freaked out... luckily I had my old kix scripts still, so I was able to bandage this.

And there it sat for months, bandaged and working.

Recently, I come to find out this is due to a security patch, and not only do you need the group in Security Filtering, you also need Authenticated Users.
http://superuser.com/questions/1106551/gpo-only-works-on-authenticated-users
I tested this on a few users, and it works.
And once again, I can take that logon script out of their AD properties.