The Sims Team has released a brand new Update for The Sims 4 for Console devices – Xbox One and PS4! The latest Update fixes the issue with save games.
Update: 11/21/2017 – v1.02
Saves are better now.
We have a new patch available NOW on both Xbox and PS4, fixing the dreaded save issue. If you’re still having issues with saving after you update, or issues in general with the game, please let @SimGuruArvin and I know! Thanks for your patience with this issue, and happy Simming!
— SimGuruNick (@SimGuruNick) November 21, 2017