Like the title suggests. You can test it by creating a table with a Currency-type column and setting the currency symbol to anything other than “$”. Then, create a chart in Interface Designer with a field summary to compute, for example, the average price using the currency column. Doing so causes either the widget to crash or to show a cut-off version of the chart.
Welcome to the community, @Matterhorn! :grinning_face_with_big_eyes: I recommend reaching out to Airtable support directly (in the app: Help → Contact support). While Airtable staffers do frequent the forum, they prefer to be approached directly with support requests and bug reports.