Both Mongoid::Criteria::Scrollable#scroll and Mongo::Scrollable now raise a Mongoid::Scroll::Errors::MismatchedSortFieldsError when there are discrepancies between the cursor sort options and the original sort options.
For example, the following code will now raise a MismatchedSortFieldsError because we set a different field name (position) from the created_at field used to sort in scroll.
cursor.field_name = "position"
Feed::Item.desc(:created_at).scroll(cursor)