This happened to my team's interfaces this week, so I hope it is a temporary issue.
As originally designed, the interface we have displayed state (location) of respondents to our form:
- Field type was Linked Record to a table where each State was a row
- In this table of States, there is a single select field that represented the region of that State (Midwest, Northeast, etc.)
- The interface was displaying a pie-chart of respondents by a Lookup Field of the single-select field for regions, with the color scheme "Use colors from base". It was showing okay for the last 2 months but on Monday this week they looked like how you described -- blank but the axes remained.
I'm sorry if this doesn't answer your question! Just wanted to share because I wasn't sure if you were asking this because you weren't sure if bullet one should work or not (in this case, yes it's supposed to work the way you want it but this week it stopped working that way), or if you know it used to work and suddenly it stopped working (which is my case, so I'm sorry if this post is redundant!). Hopefully Airtable resolves this soon.