I have code working that uses SelectedItems:Add to select items in the ListView but this only appears to work if the ListView is enabled. The ListView is contained in an UltraGroupBox that is disabled at the point when I am calling selectedItems:Add. Is this correct behavior? Is there a way around this?
That is a bug, and will be addressed in a future release. You should report it so that you receive a notification when the hotfix becomes available.