Generally speaking, when user add a new record, the grid will be scrolled to the new record and the focus will be set to the first cell of the new record. You can see the same behavior on our online demos
, you can find an example with bottom position of the new record.
The both examples work as expected on my end. Can you test them on your side and let me know what is the difference with your project? Additionally, can you specify if that behavior is specific for certain browser?