@Amigo- thanks for the reply.  I'm actually a network engineer, so i did go through it with a fine-tooth comb.  Two of the routers are in bridge mode, so they act simiar to an access point, so no issue there.  All firmware on the network devices are at the previous levels - none updated since 2020.  All are set to WPA2.  No SSID or password changes.  DHCP pool has tons of IP's available because lease time is 10 days.  I was thinking about setting up a DHCP scope for the smart devices to avoid any issues with ip conflicts, but honesly, there just aren't that many devices to use up an entire class C subnet.  All network devices rebooted, no improvement.

I checked the KASA app for updates, nothing.  I checked for firmware updates on the Kasa devices, nothing.  I am getting an occassional Java Socket error in the app when trying to turn the device on/off.  The device works about 30% of the time through the Kasa app, but not as stable like it was the first 2.5 - 3 weeks. 

Animatrix wrote

@Amigo- thanks for the reply.  I'm actually a network engineer, so i did go through it with a fine-tooth comb.  Two of the routers are in bridge mode, so they act simiar to an access point, so no issue there.  All firmware on the network devices are at the previous levels - none updated since 2020.  All are set to WPA2.  No SSID or password changes.  DHCP pool has tons of IP's available because lease time is 10 days.  I was thinking about setting up a DHCP scope for the smart devices to avoid any issues with ip conflicts, but honesly, there just aren't that many devices to use up an entire class C subnet.  All network devices rebooted, no improvement.

 

I checked the KASA app for updates, nothing.  I checked for firmware updates on the Kasa devices, nothing.  I am getting an occassional Java Socket error in the app when trying to turn the device on/off.  The device works about 30% of the time through the Kasa app, but not as stable like it was the first 2.5 - 3 weeks. 

@Animatrix ahh nice so you have a good level or network understanding. I have my lifetime ccAr certificate. 
 

Just because they're in bridge mode, doesn't necessarily mean they're functioning properly. What make and model hardware? 
 

How are your networks broadcasting? Band, channel, HT, and what are the RSSI readings?

I had a similar situation, then I tried various solutions, but nothing helped. I had to turn to IoT development for help. It turned out that the problem was with the router configuration.