Hi - Let's go through the troubleshooting scenarios for why your child's iOS device is not blocked.
Internet Connection: Boomerang needs to completely rely on the internet to hide and unhide the Apps since Apple does not let us embed our timer into the operating system. So even if there was a sporadic time when the device went offline, then the command to block and hide the apps would not have gone through. We do try again after 10 minutes.
Can you check to ensure that your child's device is connected to the internet? From your parent mode, can you invoke the Time-Out command to block and hide the apps?
Crafty Kids: Some kids figure out that they can put the device into airplane mode to have the commands not work. The really crafty ones then turn airplane mode back on when confronted. Until Apple allows us to embed the timer into the operating system, this will be an issue. If your kids are doing this, have a conversation with them and let them know that you know when they do this since you will have the message “Bedtime wasn’t applied" in your parent mode.
Tampering by Child: Kids can remove Boomerang and there is no way to secure ourselves at this time (we are hoping that Apple allows us to do so in the near future) so check to see that Boomerang is still installed. There are two areas to check:
Boomerang App: Still there?
Boomerang's Device Management Profile: Go to Settings, General, and scroll down to see Device Management. If you do not see Device Management, then Boomerang's Device Management Profile has been tampered with.
If you installed Boomerang prior to September 2017, the certificate has expired. Please uninstall Boomerang's Device Management Profile and also uninstall the Boomerang App than then reinstall Boomerang fresh.