As of the May 2019 release, rotated views will no longer be considered ‘similar’, even to other rotated views. We are taking this step due to inconsistent results when aligning views with stretched & rotated crop regions, caused by Revit API limitation.
By default, views considered ‘not similar’ are aligned using the top left corner of the view port, regardless of the contents. Views considered ‘similar’ are aligned based on the data coordinates.
NOTE: Rotated plan views containing annotation elements (e.g. section view marker) that extend beyond the bounding box (using either a crop region or scope box) will not align correctly unless these extended annotation elements are the same in both views.
As a workaround, either enlarge the bounding box to include all visible elements, or first hide them in view, perform align and then unhide them again.
Thank you for taking time to inform us about a bug or feature request.