HTML super/subscript tags not rendering in chart preview

[nleo575]

I know that I can add HTML tags to format node labels. I tried to add a superscript tag (for example 10<sup>2</sup> for 10²), but the preview is only showing extra whitespace where the superscripted text should be. If I go to export the chart as a png, the text displays correctly.

I'm using Safari on macOS to view the editor. It doesn't matter if I use the iOS or macOS version of Safari, the error still comes up.
The text renders fine if I put the same Mermaid code into the Mermaid Live editor in Safari.
Chrome browser renders the labels correctly too.