DataGrip doesn't show objects under schemas for SELECT-ONLY User

I created some lower-privileged users in redshift and when logging under their credentials they can see the database and shemas but no tables or views under the schemas. I tried "forget schema" and "synchronize" - no luck yet.

this is in DataGrip version 2017.1.5, Postgres Driver version 42.1.1

the users are granted:

• usage to schema
• select on all tables and views in schema

such low-priv user can see all tables and columns with this query:

SELECT *
FROM pg_table_def
WHERE schemaname = 'awsma'
ORDER BY tablename;

is there some other / extra permissions that DataGrip relies on to get the list of objects and attributes displayed?

thanks in advance!