Request from different subnet got time out response

[sawjai]

I have the following situation:

I’m running AdGuard Home on OPNsense, acting as a DNS server. It listens on the LAN interface (192.168.1.1) and VLAN10 interface (192.168.10.1).
A host is located in the LAN subnet (192.168.1.2).

When the host sends a DNS request to the LAN IP (192.168.1.1), it receives the correct reply.
However, when the host sends a DNS request to the VLAN10 IP (192.168.10.1), the request times out — even though I can ping 192.168.10.1 from the host without any issues.

I ran a packet capture on OPNsense and observed the following:

When the DNS request is sent to 192.168.1.1, the request goes from the host to 192.168.1.1, and the reply comes back from 192.168.1.1 to the host — as expected.

When the DNS request is sent to 192.168.10.1, the request is correctly sent from the host to 192.168.10.1, but the reply comes from 192.168.1.1 instead of 192.168.10.1.

I then reconfigured OPNsense to use Unbound DNS instead of AdGuard Home and ran another packet capture.
This time, the response to the DNS request sent to 192.168.10.1 correctly comes from 192.168.10.1, and the host receives the response without issue.

Please advise if it is a bug.
Thanks