This problem of no automatic transfer is probably due to an issue with what is known as background syncing. You can find suggested solutions to turn on background syncing/activity on this page. To do this, click on the brand of your mobile phone: https://dontkillmyapp.com/

This only applies to automated transmissions. If you also have a problem with the transfer when opening the app, check the question "Why am I not getting enough Fjuul points?"