I have a client that is trying to edit a page and she keeps getting a "someone is logged in" pop up and she can't edit the page. Yet I am the only other user on the account and I just checked and made sure that I wasn't logged in? Is there anything else that could cause this? She said that it's actually intermittent and not consistent. She was able to go in and make a few changes and then ended up getting the message again.

Please advise..