Coping file from a page to another pages links are getting vanished

Hi Guys, I am facing major problem with Figma linking.

Problem 1) I can’t connect one page to another page
Problem 2) When I am duplicating A group of linked frames in single page, all B group links are goes on A group again. It won’t remain the same for B group.
Problem3) If I copy linked frames from Page 1 and past in Page 2 Links are missing.

Any solution/ Suggestions?