On the main page, in the "details" view you will see "clients" the shows "hostname / ip" if the device is connected to the router and only "mac-address / ip" if the device not connected to the router

In this case it will be impossible for you to know what device the "stats" is for as it won´t remember the device "hostname" if this exists, and if you click on the "show more columns" it shows the "mac-address" in its own column.

I do not see the reason why it show it in the "clients" tab if the "hostname" already found once and exists, it also make no sense as you would have to look in the "dhcp" table to find what client the stats is for.