I tried to use offset cursor with GQL (<https://cloud.google.com/datastore/docs/reference/gql_reference>) as it is mentioned in the doc that it is supported, however, when it comes to this scenario, it seems the pagination stops working.

Steps to reproduce

1. run `SELECT * FROM comments WHERE feedId = @feedId ORDER BY created_at desc LIMIT 10` and get the last item as `cursor`
2. run `SELECT * FROM comments WHERE feedId = @feedId ORDER BY created_at desc LIMIT 10 offset @cursor` will return the exact result from step 1