DHCPv4: Dynamic lease not visible

[Asperamanca]

Hi all,
I use DHCPv4 service to assign local IP addresses.
Today, I connected a new device. It was assigned a valid IP address from the pool of dynamic addresses (i.e. those not used for static IP mappings).

The connection on the switch shows "active"
I can ping it within the network.

But it does not appear in my list of DHCP leases in the web UI.

This is important as I'd like to learn it's MAC address, and assign it a permanent IP.

Where do I need to look for dynamically assigned IP addresses? I've been looking under "DHCPv4 --> Leases"

[SolarCzar]

I am encountering the same problem and curious if there is an answer?  Trying to determine if I need to upgrade to 23.1x or not

[CJ]

Are you sure that you don't have another DHCP server on the network?

What OS is the device?  What does the DHCP log say?