Mathieu: True, if dnsmasq is configured not to listen on lo (using "except-interface=lo") then it shouldn't write lo.dnsmasq. That's one bug.
But do you agree that "except-interface=lo" should no longer be included in /etc/dnsmasq.d/network-manager, since network-manager now listens on 127.0.1.1 and there is no need to prevent standalone dnsmasq from binding lo's address, 127.0.0.1? If so, then that's a second bug for which another report can be opened.
Mathieu: True, if dnsmasq is configured not to listen on lo (using "except- interface= lo") then it shouldn't write lo.dnsmasq. That's one bug.
But do you agree that "except- interface= lo" should no longer be included in /etc/dnsmasq. d/network- manager, since network-manager now listens on 127.0.1.1 and there is no need to prevent standalone dnsmasq from binding lo's address, 127.0.0.1? If so, then that's a second bug for which another report can be opened.