@jimako thank you very much for your answer, actually downgrading to version 2.0.9 solved the issue on my part aswell. Even though that is something that in fact needs to be adressed towards the newer version in this case that there is some issue over there.
I mean if I go into options and choose some cookies and click on Accept&Close, it works correctly, but the “Accept all” ([cookie_accept_all]) doesn’t work as expected, at least not on this site.
