I created a simple app in android studio using WebView. The WebView element coected to a mobile website. When I login, some sessions like user and id are created to make the app work properly. Depending on the values of these sessions, information in a list is shown. But, when I login to the mobile application using the same credentials, it looks like some of the sessions are not created. When I echo'ed the sessions, they are simply not shown.
Some time ago I faced this problem too. Because I had to design the list-items, I hardcoded them. When I finished designing them, I replaced the hardcoded with the old function, and it worked! For a short time tho, after rebooting my device the old problem (as described) appeared again.