Forum Discussion
Matrix auto size
Regardless, Yuliana got it right:
Specifically because you've disabled auto-size, Power BI won't make its own (automatic) decision, so it goes to default and waits for you to manually set the column width.
When you disale auto-size, the current columns lock in their width, but new columns default to the standard size.
You could (potentially) have any combination of column widths, so Power BI can't magically determine which one would be correct.
I always have the same number of columns but the headers refresh daily. The only column that is impacted is the last one.
Regardless, Yuliana got it right:
Specifically because you've disabled auto-size, Power BI won't make its own (automatic) decision, so it goes to default and waits for you to manually set the column width.