Typically, you do not return to the Edit/Browse Table screen after every row browse or edit, but instead move through a series of rows either sequentially using <PF4> (GETCNT) or by key using <PF6> (GETKEY). This will have a different effect depending on which line command was used to select a row.
If NorI was used, a valid new row must be created before you can go on to the next row. If U was chosen and the key is modified, you will still go to the next row (even though the row you have edited may have moved to a different location). For Hash tables, “next row” is meaningless, so the <PF4> key will have no effect and the same row will continue to be displayed.