Boxes get skinnier in grouped boxplot with subplots. Looks like boxes share the same X axis for the box width calculations.
https://codepen.io/kei51/pen/VNoQEg

In a bar chart with the same configuration, it works as I expected.
https://codepen.io/kei51/pen/xMdQoX

I can see the same problem on Violin plot too.
https://codepen.io/kei51/pen/qgmQgV
