For example navigating the record with arrow keys.
If I expand the cell, I can navigate to the next record via keyboard up or down.
If I expand the record, doing same with the arrow keys does not work, but the rectangle selector still moves around behind the expanded view, but the record shown does not change.
To move to next record, need to press Cmd + Shift + . or , (on Mac). So that’s a bit unusual. Perhaps more intuitive would be just allow the arrow keys to move to next record in the expanded view.