No I think the issue is that the session isn't closing properly and then it will wait for the session to close before allowing access to the page.
You might be able to lower the session time limit to get around the problem... but again this is a server issue that should be addressed by the server admin instead of working around it.
Another solution might be to not use the session, but to do that you would have to store some of the necessary session variables somewhere else, or pass them into the page through the url.