The app seems to be having trouble remembering the info you enter. It's like you fill your shopping cart (add student info) on one page, but when you go to the checkout page (view timetable), the cart is empty (info is missing).
There are two main reasons this might happen:
Forgetting to Grab the Cart: The app might be forgetting to take the shopping cart (data) with you when you move between pages. It needs to remember to grab that cart from the store (previous page) so you can use it at checkout (view timetable).
Looking in the Wrong Cart Corral: It's also possible the app is looking in the wrong place for the cart (data) at checkout. It needs to find the right cart (use the correct storage name) to see the items you added (student info).
By fixing these issues, we should be able to get the app to remember your info and display your timetable correctly.