Downloading Realm into world stuck

When I try to download my realm in game or from backups it always gets stuck at 649mb/811mb. The loading bar will not progress further than 649 mb even when I leave it overnight and I have tried multiple times a day for a month and it still stays stuck on 649mb download. I also have plenty of storage so if there's anything else to resolve this issue please let me know asap. Thank you.