Normally for schedules, changing the column width in either edit view or on the sheet instance changes it everywhere the schedule is used. When the new 'Filter by Sheet' option is turned on, the connection of the column widths between the usages is broken. Was this intended behavior or is this a bug? If it is a bug, then the API should also be reviewed because the ScheduleField.SheetColumnWidth doesn't return the correct value, which is how I found this issue.
You can test this by placing a schedule on a sheet(s), play with the column widths and see them update in the edit view or on other sheets. Then turn on 'Filter by Sheet' and see that the column widths no longer update.