@alexcjohnson noticed a hover placement issue with Sankey - here the 633 appears on top of the white box instead of inside it. Not sure if it's a JSON construction issue or a Plotly.js issue.

The wapo hover text can also go off into the ether and does not always seem to point at the selected line:

Both of these examples are from https://medium.com/@plotlygraphs/4-interactive-sankey-diagram-made-in-python-3057b9ee8616

/cc @monfera @alishobeiri