I just got a tapo C225 an is absolutely unusable. I have some sort of network issues, but I have no idea why. I can see that a the RSSI is - 29. My network speed is around 190 mbps. Still the live stream is lagging hardly. I placed the camera right next to the router so that there is no interface with the connection, but still nothing. Even on low quality mode. The camera and application are up to date. 

I'm considering to return the camera in the next few days if this issue is not resolved.