I have 19 HS220's.  Additionally I have 10 HS200's, 4 HS210's, 5 KP200's, and 4 plugs.  I installed them back in September 2019.  Everything was working with Alexa, schedules, and remote control on the app while i was away,  I did the update on the KASA app and updated did the firmware on the devices listed in the :settings>>firmware update option from the Kasa app.  Once i did the updates, everything got messed up.  First issue: when i open the app, all the devices appear but i don't see the power on/off option that usually appeared to the right of the device name and they say "local only".  When i swipe down on the app the devices start to show up and "local only" goes away.  While in local only, Alexa does not see the devices and I can't control individual devices or groups.  After they start to reappear everything works but after 5 minutes they seem to go back into local only mode.  I have invested thousands of dollars in these switches and extremely frustrated.