It turns out this is a Samba bug, which is why disabling WINS resolution solves it. See this Samba bug:
https://bugzilla.samba.org/show_bug.cgi?id=5904
There is a proposed samba patch there for anyone who would like to try it; I haven't gotten a chance to do so but I'm sure the Samba team would appreciate confirmation of the fix.
It turns out this is a Samba bug, which is why disabling WINS resolution solves it. See this Samba bug:
https:/ /bugzilla. samba.org/ show_bug. cgi?id= 5904
There is a proposed samba patch there for anyone who would like to try it; I haven't gotten a chance to do so but I'm sure the Samba team would appreciate confirmation of the fix.