Bubble Chart - Setting a Vote Column for Bubble Size drops unvoted items

I’ve set up a Bubble Chart, using a Vote column to set the Bubble Size. However, anything without a vote simply doesn’t appear on the chart.

There’s an option to “show empty items” for items with no X-axis value - can there be a similar setting for Bubble Size? Particularly if using a Vote column for size - zero votes is a meaningful and useful statistic.