Yea its a supervisor change not core hence not in here. Change and reason explained here:
Essentially supervisor was forwarding multicast queries to the listed resolvers. This is bad practice as it risks leaking internal names to external resolvers and multicast queries are supposed to be completely handled in the ways specified by their specs which doesn’t involve DNS resolvers. We’re doing the right thing now but it does mean if you relied on a dns rewrite for a .local name in Adguard for instance that’s not going to work anymore.