When comment is too long, the pointer defaults to the last line.

[Ritesh Kumar Mishra]

When we add comment that is bit long say 40lines, and the current comment window highlights few lines only(say last 15lines) that is the default feature,  so if I have to make any changes on the 12th line starting from top that is not currently visible in the current comment window frame, as soon as I hit any button(can be character or space, delete) on the 12th line, the pointer moves to the last line of the comment and the user has to scroll up every time he/she enters any character that makes it difficult for the user to edit any comment or to add any comment if they have missed it.