I sometimes get the same, only on certain pages of the forum. I just don't worry about it. And if I want to go back, I don't hit the back button, I just immediately click on the page I want to go back to (saves waiting time

).
It may be something that's wrong in the coding of the website, that the link is wrong or something. I get it on every computer I use too. It shouldn't be the connection.
I
can't offer a solution, unfortunately..
El