World becomes corrupt when accessed from two different Xbox consoles, both with version 1.19 installed.

Copy of world does not appear on the worlds list of my second Xbox. I accessed the original world from over a year ago, which had a different name. When I looked for the world on the first Xbox(series s) it looked fine. However, when I went to make a backup to be safe, the thumbnail changed. When I entered to world I was in the correct area with my correct inventory, but many chunks were not there, including the ones that I had been building a 400 block long ship on. I exited, closed minecraft, ect, but nothing worked. Just really frustrating that I HAVE to get a realm to not lose my work.