@JonnieMorgan
Please double-check whether the appliance is a supported type by the Tapo smart plug. Controlling an unsupported device has risks of damaging the smart plug. What types of loads can the Tapo plug support?
Additionally, please note that the Tapo smart plug is suitable to control one appliance at a time, connecting a power strip to power multiple load devices is not recommended. Overload situations might occur without your awareness and damage the smart plug gradually as time goes by.
If the product fails under proper usage, reach out to the retailer or local TP-Link support for warranty assistance.