Adamm
Part of the Furniture
One recommendation is to include proxy-dnssec in dnsmasq.conf.add
Another FYI....also automatically done in my fork with stubby enabled and you are not using dnsmasq's dnssec support.
This could be added quite easily, unfortunately I don't know enough about stubby/dnsmasq to know the adverse effects. If I get the thumbs up here that it won't cause unrelated issues I can post a commit.