Haven't researched the whole issue (or checked your links), but this fairly recent Youview community article strongly suggests that Youview themselves are aware of the issue and are investigating.
https://community.youview.com/youview/topics/netflix-crashes-at-midnight
It appears to be a very random occurrance, effecting a small number of people, which is why it is difficult to pin down or reproduce. I am fully aware of the issue because my wife keeps complaining about it.