Hi Vrivera2022,
I believe the issue you may be referring to is the one where player’s saves became stuck when loading. Saves affected by this issue cannot be restored due to the nature of the issue that resulted in an error when saving. The hotfix that was released by the team was to prevent this trigger from occurring again in existing saves, but as a side effect, saves stuck in the loading phase cannot be accessed by players even though players may see the save data on their console, this then results in the save slot starting a new game - the team are investigating why this would be to ensure it does not happen again.
It sounds like you may already be aware of this post, but if not, more of the latest information on this issue can be found here: [Known Issue][PS4/XB1] Stuck in "Cleaning Up" phase on load - Please note this thread covers the first time the issue appears, the subsequent fixes and the issue appearing again in Single Player saves more recently.
If a new save is started in the same save slot, the map seed may have been randomised again which is why you cannot see the same seed number. If have sent a message to the team asking if there is any way to see the seed number if you were to save the old save file to a USB (If it hasn’t been overwritten by a new save in that slot) - I’m not a dev so I’m not sure if there is but if they have a solution that may help I’ll let you know.