I am outfitting my recently purchased home with Kasa smart switches because I installed them in my previous home and loved the functionality. I have installed them in most of my desired locations, but am having an issue with one set of three-way switches. The "dumb" switches work as intended, but when I wire up the HS210 in the same manner, it does not function properly. When installed, the HS210 only receives power when the other dumb switch is switched one way. When the HS210 is powered, the lights switch on then off very quickly, and the switch appears to power cycle or restart. I have tried to place the HS210 in each location, and the same problem persists.
I have attached pictures of the "dumb" switches as currently configured, as well as a diagram if the pictures are not clear. Can anyone offer some advice?