Sleep data does not sync form watch to app

Since the last few days (probably after one of the recent updates), I’ve noticed that my sleep data no longer appears in the Garmin Connect app. The watch itself records the sleep data correctly, but it doesn’t sync to the app.

All other data (steps, heart rate, activities, etc.) syncs without any issues — it’s only the sleep data that’s missing.

Has anyone else experienced this recently, and is there a known fix?