I tried opening a JIRA but your server timed out.
Try adding several lines with the same piece of target text say FOOBAR in each line.
Place in the middle of those lines a line that is really long that doesn't wrap to the point it forces you to scroll the window to the right to reach the end. At the end of that line place the text FOOBAR.
Start searching from the beginning. Search works alright until it hits the really long line and needs to scroll to the end. Any other searches like hitting F3 after that will start from the beginning of the same line and once again scroll the window to the match the same match as before.
To continue searching you need to manually move your cursor down below that line.