Devices are paused but still connecting

I am using xFi to control the amount of time my children are using their devices. I have active time limits set and have toggled to have them pause for the rest of the day once their limits are reached. Sometimes it works. They reach their time, and they are no longer able to play Roblox, Minecraft etc. And sometimes the devices say they are paused in the app, but the devices are NOT paused. They are still able to access the internet and do live streaming/gaming/ internet searches. Etc. This is VERY frustrating. The device will have the pause icon shown in the xFi app but the hours of online activity continue to tic up and they are still connected. And as I said, sometimes it works. There seems to be no rhyme or reason. Does anyone have an answer?