Hey @drewHolmes 
What version of Auth0-PHP is your application building upon? You might simply be hitting the local session lifetime expiration default of the library, which is controlled by cookieExpires during class initialization in the current V8 release.
Just noticed that you’ve mentioned a few particular variables specific to V7, so safe to say you’re not on V8 in that case. V7 uses PHP’s native session handlers to store local session information, which is controlled by settings like session.gc-maxlifetime and session.cookie-lifetime. You might check and ensure those variables in your PHP.INI file are configured adequately for your needs, in case those are the root of your issue.