"Count" & Custom Measures On Bubble Charts

I would like to be able to use the new Count measure, as well as Custom measures, on bubble charts. Right now, any columns in my grid related to either of those do not show up when I go to make my bubble chart. The use case I’m currently looking at is comparing customers across their sales, gross margin, and product mix (the last one being the radius of the bubbles).

On grid side:

On Chart side:
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