Training Status doesn't sync in Garmin Connect, and REM status isn't detected during sleep. These issues are not related to the firmware version. Many users, with diferent firmwares, are suffering them since four days ago. It's something external. Maybe will be fixed with a new version of Garmin Connect, but we don't know anything.
I have written to the email address, but I think any information related should be published here, in the official forums.