The same happened to me, and I think with dozens of others, some of them contacted the providers thinking that the networks had been hacked (to a report of this in the Google Play store Brazil Kaspersky: VPN & Security – Apps no Google Play ), I uninstalled it several times and sent a communication to support that actually confirmed that it was a bug and that they needed data. So I recommend that you contact support so they can send you the guidelines for you to help
Figuring out a way to "soften" the situation, these are just steps:
1) Clear the history of devices connected to the network on the Smart home and set it to not show;
2) After doing that, turn on the VPN and choose a country (I chose France) and go there and re-enable the Smart Home;
3) After the devices connected to the network and some 'ghosts' appear, turn off the VPN and the unknown IPs will after a few minutes, appear as "recently connected" (i.e. they are now disconnected) and the really connected devices will appear normally.
However, after a second update that happened in December, this method that is a palliative lasts a few hours and then the bug returns, in addition, the app started to crash out of nowhere, not updating automatically or doing the daily scan, the "clock" crashes the day before and the battery consumption is high. I hope they fix it soon