We finally resolved this issue. First, a big thanks as always to everyone who commented and helped us along on this thread. Second, here is the resolution. In our case, the problem was some enhanced security filters that we put place recently. One of the scopes being scanned was the cookie scope. This was working for the most part but would result in these sporadic failures which were hard to pinpoint. The key clue was that we realized that the cookie.jsessionid was remaining persistent but the session.sessionid variable was not "sticking" - those two should be the same. Once we started focusing more on the cookies, we eventually realized what the problem was. This issue may not be applicable to others, but if your sessions are resetting with every request, you may want to take a closer look at your cookies and how they are tied to your sessionid. I still don't truly understand how a sessionid could change without a change to the underlying cookie, but that appears to be what happened. Nick
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