The issue seems to be gone after the last update. It was a bit intermittent in the last 3 days, in the sense that I would not need to login again for many hours but then suddenly I needed to. That happened a few times but seems to have improved a lot yesterday where I logged in only once in the morning.
But today was the first time that I didn't have to login again in the morning, first of all, so that's a good sign!