First of all, you need to be on the "All" tab. That's the only one that will show multiple bars, every other one will ONLY ever show that single bar.
Secondly, if you simply moved the bar slider all the way to the right... Then it should still be there on the far right of the "All" bar, ready to slide back to the left.
If that bar slider has actually disappeared, then that would be a bug and you should make a report.
