Duplicating Columns in App Structure hit and miss

When Duplicating Columns or other items in App Structure I am unable to duplicate them using the app structure menu. What’s odd is— I choose duplicate column and if it doesn’t work - then I try another item of same type ie column on same page to test and it works fine - so some will and some won’t.

I have use code view to duplicate the problem items. also I seem to have to either close and reopen pages or quit and restart Wappler to show some changes. Should i do a reinstall ? (running latest Wappler as always — any guidance appreciated.

Also was the duplicate icon in design view retired - I don’t see it any longer.