I'm exploring how we will visualize bounded data in Lens, and found this issue. As seen in this band chart, the lower value is not shown in the tooltip.

Also, I would like to treat a band as a single series, not as a two series. It doesn't seem like it's possible to get the series name to only show up once in the legend, even using code like:

          y0AccessorFormat={''}
          y1AccessorFormat={''}