Unbound stopped resolving

[tl5k5]

I posted this back on March 23rd in the 23.1 forum but since there were no replies, I thought I'd post it here.

This morning I started the day with 22.7.11 running on one of my proxmox servers.
We started noticing some webpages weren't accessible.  It progressively got worse so I start troubleshooting.  I quickly realized the OPNsense VM shell can ping external domain names, but any internal clients couldn't resolve external names.  I upgraded the VM to 23.1.4 in hopes it would solve the issue, but it did not.  I ended up restoring a VM backup to a known working state from 2.5 weeks ago and clients still couldn't resolve external names.
I then disabled Unbound and enabled Dnsmasq.  Clients started resolving correctly.
Why would 22.7.x and 23.1.x both have issues with internal clients resolving external names but as soon as I restored back to 22.7.x and then switched to Dnsmasq it started working?  Before moving to Dnsmasq I did check the logs and found nothing out of the ordinary for Unbound.
I see the current config as a workaround and not a fix.  Any ideas?
Thanks!!!