I believe I may be having the same problem. I’m no longer seeing any values from a couple of fields from restrict content pro. When I do a direct query to the DB i see the data. I get “no lines” when I have an exclude on a value from RCP. When I remove the exclusion I get all the data with no values in RCP fields.
LEFT JOIN bks_usermeta subscription ON (ID = subscription.user_id AND subscription.meta_key = ‘rcp_subscription_level’)
LEFT JOIN bks_restrict_content_pro rcp ON (rcp.id = subscription.meta_value)