When single column (or a column which stacked by multiple series) facet chart is plotted, normally the the column will occupied the chart field completely. However, when the series name within the info box is long enough, reducing the chart field width until the info box out of the chart field area will caused the info box extend outside of the chart field where the values that located at the right side of the info box will disappear. Increasing the chart field width by resizing the chart field again would not solve this problem. The only way is drag the column left right which will resize the column and this will recover the info box back to normal (The column width of the column must be larger than the maximum width setting of the chart field I think?). This bug can be triggered easy if the left Y axis is enabled which in fact decrease the chart size a bit.
The example of this bug is shown at below:
https://jsfiddle.net/YeongCY/51fs75va/2/
Thank you.