Using Primero v2 on a mobile device or tablet

If you “swipe away” a browser when you’re using a mobile device while online and do not click save, the data doesn’t cache to phone and what I have entered doesn’t save. Is this correct behaviour?

Yes. Any time you are editing / creating a case, you must save. Note that if you were offline, had clicked save, then “swiped away” your browser, then later reopened, your offline save would be retained, and it would be synced once you came back online.