do you have a tp-link router? this usb 3.0 is plugged to which unit?

2.4g or 5g?how many devices connected? both wired and wireless drops? when it happens, wifi signal disappear? how often does it happen? firmware upgrade done?

yes, you can enable remote control. http://www.tp-link.com/us/faq-948.html

hi shawnjanes , have you tried sign out of kasa and sign in again? make sure your phone is connected to the same wifi as plug. [COLOR=#3E3E3E]

drimplant wrote I may have an answer to the problem. Not a solution yet, but what may be the issue. My network is 192.168.1.x. The TP-Link Smart Plug mini has a network address of 192.168.0.100....

is your Wi-Fi broacast ssid? 2.4G or 5Ghz? You can try different channels on your router or move it closed to the router during the setup process.