My guess is that you're refusing all cookies. If the site doesn't have the basic cookies then every refresh or new page means the site doesn't know who you are.
My usual preference is to allow the basic cookies and refuse the advertising cookies.
I must say though, I visited the electricians forum a couple of days ago because I had a notification, got the cookie permissions pop up and after about 5 minutes of going through the cookie settings I was only about 5% of the way through the list of advertising companies who would get my data. I just closed the page, whatever the notification is, it's not worth an hour of setting cookie permissions.
I've never seen a list of organisations who the site owners are selling my data to anywhere near as long as that one.