Hello,

Sometimes you may find in your Messages that your device is being quarantined, this situation may occur when your device is sending sensitive information or security threats out of your network.

To find out the reason why the device is quarantined, please click the “>” button on the Message.

The Quarantine will only prevent infected devices from sending sensitive information or security threats to clients. But secure packets will still be sent out. In other words, it does not affect the normal use of the device itself. 

Sometimes when you see the device quarantined, you may not want it to be quarantined. Then you can turn off the option Infected Device Quarantine in Antivirus.

Besides, you can read https://www.tp-link.com/en/support/faq/1476/

Good day.