What's the hardware version of your TL-WPA4220? When you tried different TL-WPA4220, still the same issue?

What's the schedule you configured? Are you configured the parental control function on the modem? is it possible to check the settings you configued on the modem?

Hi, What's the HW of your router? Is the cisco anyconnect an VPN server which installed on your computer? And is it in your office? Can you describe your network diagram in details?

Hi, when the C5400 losing connection, how about the lights on it? Is the internet light still on? Whether your firmware is the latest one, you can try to upgrade if the firmware is not the latest...

Is the Philips Hue Bridge a mesh device? Do you want to use it to build a mesh network with the Deco M9plus?

How about move the devices next to the main mesh unit, turn off the other mesh device, and make sure the smart devices only connected to the main unit's wireless network, then check whether the...