Bugsnag has been reporting a single client (same ip address) keeps receiving a TokenMismatchException throughout the last few weeks on my production Laravel 5.1 environment, no other client has experienced this issue so far.
Stacktrace
Request Data (Obscured)
I considered perhaps the session was dying for this particular client, that they spent too long idle on the login page however I noticed sometimes they make 2 or 3 attempts in quick succession.
I'm preparing to contact the email address but wish to understand the possibilities of why this exception keeps occurring other than a genuine attack before I do.