@Sunshine 

I have been trying to figure this out for a few days.  This is what I know for sure. And why I think it's the router. 

- internet connection in the tether app allows shows it's connected

- devices connected to the router when the "bedtime" starts, get blocked. Even if they are not setup in the profile to get blocked. 
- devices that are not connected at the start time, can connect to the router and have no issues using the internet.  If this device is still connected the next day at start time, it's blocked, again not part of the profile to get blocked

- when "bedtime" should end, everything that was blocked is still blocked. 
- just removing devices from the profile does not resolve it. I have to delete the entire profile. 
 

note, the first few days after setting this router and parental controls up, it was fine. Since then it mainly acts like this. There has been a day or two randomly where things started to work as expected, but it always goes back to this.   
 

This is my only router device. No extenders, or mesh, or other devices around that could confuse it. I have a single connection to our cable modem to it, and that's it. 

also, I do not have "smart connect" enabled. I have a couple of older devices that require 2.4ghz connection only and they would not connect to the router until I disabled "smart connect". 
 

one other odd thing about this device (may be unrelated). There are no "wired" devices connected, all wireless, but it always shows in tether that one or two devices are connected as "wired".