WTH phone or tablet devices are duplicated if I use different conections

Hi

I used to have at least two connections on my device, local IP and Duck DNS url.

Once I connect, HA identify each connection as a different device, but is actually same device;


Why HA can not identify device properly, using MAC or device name?

It might already be using MAC address.
A MAC address is using inside a local network. Once a packet hits a router it will replace the MAC address with its own.
I think that also happens when the packet hits a switch actually.
MAC addresses can’t be used for what you want.