In queries, if you have the operation EDIT checked as default (making the grid records click-able):
1) If you click anywhere on the row, the record will open
Clicking any operations buttons/icons//links located of the left of the row, not only start the process/operation but it also opens the record (EDIT operation executed) listed on the grid.
2) If you have 'hidden initially' checked, clicking the (+) sign at the beginning of the row also opens the record. Therefore, cannot expand the row to see the hidden information as the EDIT operation is executed.
Cheers