SELECT xattr from SUBQUERY result returns no values

Load documents into default bucket, add xattrs, run query:

select meta().xattrs._system1 from (select * from default) d --> returns nothing

select xattrs._system1 from (select * from default) d --> returns nothing

select _system1 from (select * from default) d --> returns nothing

but 

select meta().xattrs._system1 from default --> returns correct xattr values