Not sure of course.... but I think what was meant originally is this.....
I can set this board in a way that it remembers me. So, every time I come here it recognizes me and I am in without having to sign in. But, now and then, mostly if something big on the board changes, it happens, that I come to such a board and it does not recognize me, I have to sign in again. In that situation I click again on the checkbox that it should remember me. As I said, this does not happen very often, but now and then... sometimes months apart....
I don't see this as something severe.