There's something awry about the "fewer code execution errors" graph: I count an odd number of columns when they ought to be in pairs.

Clicking on the graph to go to plot.ly and viewing its "data" tab, it looks like there's a blank X value for:

         text                                                                           y                   x
    0    bucketed_success_rate: -0.02<br>pct: 0.1<br>`Interviewer Would Hire`: False    0.0987654320987654