I/O on timeline behaviour

when i select I/O on the timeline, should it look like this?

Screenshot 2022-06-23 at 12.46.23.png (47.39 KiB) Viewed 661 times

Or should it be like this, with the area highlighted?

Screenshot 2022-06-23 at 12.45.38.png (51.7 KiB) Viewed 661 times

and how do i control it? reason for the question is because some operations will behave differently. like ripple delete.

for me it acts quite random, and i'm wondering if it's a bug

The I/O range is highlighted only if nothing else is selected in the timeline ➧ Your second picture
One Clip is selected (orange stroke) ➧ In your first picture

In the timeline DVR is focused on : the selected clip > I/O range > Playhead

next you can play "vertically" with "Track selectors"

Ah, so that was the catch. thanks!