Host not connected to my router shows up in a nmap scan

After scanning my local network with nmap, this host shows up listed as a nmap result but it is the only host that shows on nmap that is not listed as a client on my router list of connected devices.

❯ nmap 192.168.0.xxx -A                                                                                                                                                                  Starting Nmap 7.80 ( https://nmap.org ) at 2020-04-21 14:33 -03 Nmap scan report for 192.168.0.xxx Host is up (0.0056s latency). Not shown: 998 closed ports PORT     STATE SERVICE VERSION 6666/tcp open  upnp    MiniUPnP 1.6 (Linksys/Belkin WiFi range extender; SDK 4.1.2.0; UPnP 1.0; MTK 2.001) |_irc-info: Unable to open connection 8888/tcp open  upnp    MiniUPnP 1.6 (Linksys/Belkin WiFi range extender; SDK 4.1.2.0; UPnP 1.0; MTK 2.001)  Service detection performed. Please report any incorrect results at https://nmap.org/submit/ . Nmap done: 1 IP address (1 host up) scanned in 37.47 seconds 

What exactly about this host might be causing it to show on nmap in my local network if its not connected to my router?