I’ve been having the same issue. I’ve been trying to learn patience, but it often takes 60-90 seconds to load and “un-freeze” so that I can scroll and view my email. Instead, I’m gradually moving accounts and subscriptions over to a Gmail account, which loads and refreshes in 1-2 seconds. I wish Comcast/Xfinity would correct this, but it’s been like this for so long that I don’t give it much hope.