If I open the TL and then select an extent of time and double click on it often, not always, nothing happens. If I then zoom in a single step and then try it again it's fine.
Secondly, if I opt-click the zoom out icon to see the entire TL view, I cannot select and zoom either. I have to zoom in a little and then try again.
If I mess with this long enough I have to open a workspace to get the select and double click zoom to work again.