Could not duplicate on my C8 running 2.3.9.162
- From the Kasa App, check the HW and FW versions of the devices not being installed. (Kasa is now using two api's for the HS200 and HS220 - depending on hw version). See "Kasa and Tapo Switches, Plugs, and Bulbs - Hubitat Support".
- First, eliminate the obvious that the Hubitat update caused the issue. Revert your hub to the previous version using the diagnostic tool and retest.
- Some cleanup: Assure your router has DHCP reservations on all the devices.
- Check and make sure the Hub and the devices are on the same SSID on your router. If not, make sure that one is not protected from the other.
- Aside from updating, has anything else changed in your WIFI LAN configuration?