Restricted websites and settings continually disappear from Screen Time.

Since the restrictions are syncing at first and then disappearing later, I wouldn’t keep resetting the devices. Apple says Screen Time settings for a family should sync as long as all devices are updated, which you’ve already done.

I’d make one small test instead: add just one blocked website from Settings > Screen Time > [child’s name] > Content & Privacy Restrictions > App Store, Media, Web & Games > Web Content, then check whether that same entry survives for a day or two.

If even a single restriction disappears again, that points more to a Screen Time/Family Sharing sync problem than anything wrong with your list. At that point I’d report it to Apple rather than repeatedly rebuilding the restrictions.

Thanks for the update. Since it happened again even after a simple test, I think contacting Apple Support is the right next step.

If you can, take screenshots of the restriction before it disappears and again afterward. That may help if they need to escalate it as a Screen Time/Family Sharing sync issue.

Please do post back with what they tell you. It could be useful for others seeing the same behavior.