In this example, there 3rd nest column header ({label: “”, colspan: 1} after “T12” is set to 50px width), however, the table render 78px.
Also more interesting, the last column which is also set to {label: “”, colspan: 1} does honor the width setting of 50px.
Is this a bug similar reported as this [GH #2151] Column widths incorrect with nestedHeaders plugin ?