Hi,
There was a similar question on the forum 2 days ago, there may be some info in it thats useful to you? https://forum.mendix.com/link/questions/96091
Also: when the user returns to page 1 after pressing the browser back button, can you see if the object still exists? For instance, if there is a ‘Description’ attribute that is displayed on page 1 and filled initially, can you still see that value?