Node labels are missing in Sankey SVG export

Trying the example of the documentation under Spyder give me a diagram without label.
Did I miss something?
The code is the first example of this page: Sankey Diagram | Python | Plotly

I am running with plotly 4.14.3
EDIT: It seems that the problem is only arising when trying to export in svg format (with orca or kaleido). Png and pdf look good.