@Kuraitengai 

The blinking lights means they are connected to your Wi-Fi, the solid lights mean they are synced to the cloud.

So your devices are still staying connected to your network, they are losing connectivity to the cloud.

Try placing one of the cameras as a DMZ in the router to see if the router firewall may be blocking it when the issue happens. Disable the DMZ after testing.

@Tony 

absolutely does not work. Nothing is wrong with my router setup.

a flashing light supposedly means it's connected to WiFi but not the cloud. Except when I log into the router no up address was assigned to the Kasa spot despite having a reserved address. Every other device works perfectly. All my Kasa smart plugs with fine. Only the Kasa spots refuse to reconnect without a hard reset. It's not a router issue and it's not a network issue.

the only way to get it to connect is to physically pull the plug every time. That is absolutely not how the camera is supposed to work. It's also not how the camera used to work when I first got it. And nothing with my isp or my network has changed.

@Kuraitengai 

I have the same exact problem, since I put my cameras. One of them goes offline with no apparent reason. I have a very strong WiFi and ISP speed. No clue. HELP!

If one camera works and the other does not with the same network and other variables it may be defective at that point. It would be recommended to reach out to your local TP-Link support as everything you can try at least on your end does not work.

@Kuraitengai Omg! This same exact thing is happening to me! One camera works and the other does not. I thought I was going crazy because i am not having issueas with my WIFI. so glad i read this thread.

@Tony WHO AND HOW DO WE GET IN CONTACT WITH A LOCAL TP-LINK SUPPORT?