I picked up two additional HS300s and after trying to get them set up, they consistently disconnect from the Kasa app then reconnect repeatedly

my router sees them, but I have no idea if the router is noticing

using ping, I see them connected fairly solidly

had my phone change to a different wi-fi access point to make sure it wasn't an issue there

when trying to connect to them with home assistant, I get this error, even reset my password to make sure that was not the issue

Unable to authenticate: Device response did not match our challenge on ip 192.168.0.XX, check that your e-mail and password (both case-sensitive) are correct.

I have a working HS300 that has no issues, the app says all three are up to date on firmware. re-installed the app in case there was an issue there

are these defective and should I return them?