I have observed breaches on both domestic and international flights. There seemed to be more breaches when our flight went through Toronto. I do not have any supporting evidence, but it seems to me it is more difficult in Toronto. It is more difficult in Wabush because it is located in Newfoundland and Labrador. I noted there were fewer problems when we stopped over in Montreal. In my humble experience, breaches seem to occur when aircraft fly in anglophone areas. That is where where it gets harder to obtain services in French.
On September 28th, 2017. See this statement in context.