With duplicated data, area mark goes a little nuts, line mark is fine

[pdebruic]

When plotting a time series with multiple instances of two (or more) data points at the same time the area plot doesn't draw a coherent shape.

This helped me find a bug in my own stuff. So I'm fine after removing my duplicated data.

This is an example
https://observablehq.com/d/bd4e9b56a1163065