Hi, I just wanted to bring to your attention an earlier thread [1] in which I had already encountered/reported behaviour that is either exactly the same or is closely related to what is being discussed in this current thread. If it is different please take that into account also.
------ [1] https://www.postgresql.org/message-id/CAHut%2BPvJMRB-ZyC80we2kiUFv4cVjmA6jxXpEMhm1rmz%3D1ryeA%40mail.gmail.com Kind Regards, Peter Smith. Fujitsu Australia