Hi Aaron,
Are you seeing this issue only after upgrading the server to 6.6.x version. Correct me if i understand worng ,so NAD IP value is missing when you are tyring to filter the NAD IP?
Does all the NAD IP missing or few of them missing?

I would recommand to open TAC ticket for this issue. We need to manually update the NAD IPs in database tables to fix this issue. Only Aruba TAC have full access to the database.
Regards,
Pavan
If my post address your query, give kudos :)