Me too. I have tried it on three devices and two different browsers, same result. Its been really bad lately.
Yeah, I mean this has been a fairly consistent issue over the last couple of years, but I agree that it is worse recently.
It really doesn't make any difference to exit and re-load from the front page so it is better to just keep hitting re-load when you get the message. This is especially important when the message appears after you've typed a [sometimes] fairly lengthy reply in a thread. If you keep hitting re-load, it will eventually be back to normal.
In the past, it has been said that it is because of high traffic levels on CB, but this honestly doesn't seem like it has anything to do with it. It's not like it is worse during game threads or anything. Probably just an issue with the server, but either way, I am happy to have CB to visit!