Do you have a link to the page we can check? It sounds like you did what I would suggest of checking the layers panel and while not necessary to duplicate a page, that is similar to adding new boxes to the page to make sure there isn’t an issue.
It sounds like it might be an issue and if you haven’t already reached out to customer care, you could also report it as outlined here.
Definitely let us know if you do reach out to the team and what the resolution was.