We have an app built on CodeIgniter (and Bonfire). We had the app up and running for a few years in a folder called "app". About a month ago we copied this folder and made a new folder "appdev". We made code changes (mostly theme related) in the appdev folder. Once we were satisfied we renamed the "app" folder to "appOriginal" and renamed "appdev" to "app".
Now we have an issue. When our users access our app via a smartphone or tablet, they get logged out randomly many times. I believe this is due to sessions and ajax calls.
We need a CodeIgniter expert to correct this bug for us.