Bug: Play Mode track separator icon not appearing

Hi. In this video: https://www.youtube.com/watch?v=jk4AbE0bVXU it shows how to click on a track separator in the bottom left corner in Play Mode to change the vertical size of a track. When you mouse over that separator in the video, it shows a little icon appearing to indicate that your mouse pointer is in the right position.

When I tried this in Version 1.2.10.139, the icon did NOT appear, making it very difficult to determine if the mouse pointer is in the right position. While the track vertical sizing feature does work, it’s very difficult to put your mouse cursor in the right spot. Please verify and address this.

Thanks,

Dan.

p.s. I looked for a bug capture page, but could not find one. So I posted here.