Hey,
this is soooo subtle, but I think it would be the intuitive thing to select a newly created/duplicated master in the editor.
I would say more often than not after duplicating a master I close the font info, work “on my new master”, only to notice 5 minutes down the line I’ve been working on the previously selected master and have to meddle around to swap them.
I can’t be the only one this happens to all the time.
Best,
J.