I've installed a new KS220 smart dimmer switch (after successfully installing three of them previously) and I cannot get this one to reliably connect, or stay connected, to Homekit.

I moved one of my mesh routers to be in the same room, and they're about 10 feet apart.

I added the switch to the Kasa app successfully and was able to do a firmware update.  It is now running the same firmware as my other switches of the same model.

I cannot add the switch to homekit after successfully adding the switch to the Kasa app.  Invariably times out.

The only way I can add it is to do a full reset (10+ seconds on the reset button), then add it in the Homekit app.  Which works.  However, the switch is immediately "No Response" within homekit after it's been added, and no amount of reboots changes that.  I've been knocking my head against this for several hours and am on the verge of returning it.  Any ideas or help would be greatly appreciated.

Thanks,

-Chris