AdGuard Home not getting the Hostname from the clients

[logicito]

I have OpenWrt running on a VM in Proxmox, I have configured the DHCP server with Option 6 to provide the clients the DNS server IP (AdGuard Home). I can see in the Active DHCP list the clients with their hostname, IP, MAC, lease time, etc.

I have AdGuard Home running on a different VM in Proxmox as well, all the DNS traffic from the clients come to AdGuard Home without any problem and it's blocking the ads.

The issue I have is that in AdGuard Home, Client List or Query Log, I only see the IPs from the clients, for some reason I am not seeing the hostname as I see it on the OpenWrt router.

From a previous configuration (I think instead of OpenWrt I was running OPNsense with AdGuard Home as a plug-in), I was able to get the hostname from the client into AdGuard Home without any problem.

Any idea how can I fix this? Having the hostname is useful to better understand the statistics and which client devices are involved.

Thank you