During Downtime, contacts not “specific contacts” are still available to contact

User of the device with Screen Time Downtime limitations is still able to communicate with contacts not designated as “Specific Contacts.” I have setup the limitation so that only “Specific Contacts” can be contacted during Downtime, but there seems to be a bug in the system and the user of the device has been able to contact them still. I’m not sure if this has to do with the Downtime hours or not. When I had them set for 8:45 PM to 7 AM, it seems to work. But when I have the hours set for 8:45 PM to 3:30 PM so that Downtime extends through the night and school time, that appears to be when this occurs. Please advise.