New notice says exactly that
We are investigating a stability issue impacting Career Mode saves that were manually or auto-saved from April 16 9:00 AM UTC to April 22 6:54 PM UTC. This includes saves that were created before this window of time, but were saved during this time period. This issue was caused by a Squad Update that has since been rolled back, and these saves will experience stability issues if loaded while we work towards addressing them. Career Mode saves that were created and saved before or after April 16 - April 22 continue to function as usual. We’ll provide an update on our investigation when available, and you can follow this issue directly on our EASFC Tracker.
