Keyboard navigation doesn't load data to the table with enabled “scroller loader” feature.

I use my keyboard keys (up/down) to navigate the table with 1000 records and jqGrid's limit 100 rows. jqGrid doesn't load new part of data when I press “Down” key on the record with id=100. But If I use the down arrow of the table's scroller – jqGrid immediately receives new part of the data.

I think this behavior is not correct.