Page comments Disappear on import

Consider the scenario. There is File A and File B. People have made comments on File B. I now import from File A into File B and replace pages. Is it expected behaviour for the comments that were made on the pages in file B to be removed?

I see the comments still exist on the discussion tab on axure cloud- but I no longer see them on the page the I replaced on import. Is there a way around this? We regularly have an internal Link and a Client link that we export to which we share with clients. But when we update the pages via import any comments the client has now made on the page disappears. Is it possible to avoid this?