I just upgraded to 2020.0.15 and now for some reason lookup fields that should be filtered based on Advanced Security, User ID Field, are no longer filtered and all values are now available.
This solved the issue:
The default “USER_ID_ALLOW_SECURITY” is set to 256 (lookup) in 2020.0.15. in Global Codes
Edit to 0 solved the issue
Config(“USER_ID_ALLOW_SECURITY”, 0);
Update the template from “Tools” → “Update Template”, and try again.