samba nmbd: query_name_response: Multiple (2) responses received

It could be because of a host in the same physical network which have two interfaces. The broadcast query coming in is replied to both of them by your nmbd. Please see this 17 years old answer at https://thr3ads.net/samba/2000/08/1675707-query_name_response-Multiple-responses-received

For me, the answer was to be found here: https://forums.freebsd.org/threads/samba-multiple-2-responses-two-freebsd-systems-on-my-network.65759/
And specifically the last sentence

If you are doing standalone, then you should have local master = no, domain master = no and preferred master = no. Disable all the wins stuff too. I think all you would need is workgroup = WORKGROUP

However, I don't use an NT domain to log on to. I actually use nothing more than a workgroup. the "prefered master = no" was the one I had to change. I had it set to 'yes' on 1 host. Changed to 'no' and restarted samba. Everything kept working after that and the messages stopped.