Kea dynamic leases and Unbound DNS

[dopey1620]

So I'm a little confused what's going on with Kea.  There's a bunch of github issues and a couple of posts on here regarding whether or not Kea registers static and dynamic leases with unbound DNS.  There's one here https://github.com/opnsense/core/issues/7475 where it looks like it does not register dynamic leases with unbound.

But, just out of curiosity I gave Kea a try and it does seem to register dynamic leases except I've seen an interesting behavior on my setup.  I have 4 interfaces (3 of them are VLANs).  I only seem to get the non-VLAN (my primary LAN interface) entries registered with unbound.  All of the other interfaces do not have their dynamic lease hostnames registered with unbound.

I know I can workaround the problem with static leases and/or unbound DNS override entries, but given that one of the VLANs is my IOT vlan with lots of random devices, it's not a super scalable solution :)

Am I missing something here?

Thanks in advance for any thoughts.