. To go issue page.
2. Switch to detail view.
3. Two panels are showing up.
4. Click 1 of the issue on the left panel shows detailed info on the right panel.
5. There is a blue square around on the issue you clicked to know which one is in use now.
6. Once you click outside the left panel for example to add a comment on the right panel, the blue square on the left disappears.
So when you are ready to check the next issue from the left panel, by a quick look, we don't know which ticket is open.