When modifying the column widths on a saved view, there is no prompt to save or revert the view as is normally seen upon updating a saved view as seen below
This behavior has been observed for views that were migrated from the old user interface to the new user interface on the Backlog page
Release : SAAS
Component : AGILE CENTRAL
At this time, the recommendation is to recreate the view. Making a copy will not work as it copies the inherent issue preventing the update of column widths.