Same IP different MAC Address

Hello,

I am getting an alert with my monitoring software that and IP address 192.168.5.10 hits my router at the same time every day but a different MAC address gets assigned every single time.

I block the device when it shows up in the app.  The next day it shows up again with the same IP and different MAC:

Has anyone had this same issue?

I can't get into the logs on my Eero gateway.  I have bridged the modem and Eero does all the routing.  I have multiple multiport dumb switches.

I have no issues with any surfing, gaming etc...  

I want to figure out what / how this is happening and stop it.  

Example:
IP MAC:
192.168.5.10  1E:87:EB:XX:XX:XX
192.168.5.10 A2:A5:80:XX:XX:XX

Cheers,

Mike Shain