The issue here is not bugs in the syncing software, the issue is that you are not presenting an accurate view to the user. Loosing internet connection from your

The issue here is not bugs in the syncing software, the issue is that you are not presenting an accurate view to the user. Loosing internet connection from your mobile network is not a bug, it's something expected. What you should do instead is to present to the user that you are in an unsynchronized state. I always add an internal watchdog for cloud sync and if time to last update goes above X seconds, you pop up a notification bar with a loading spinner that says "disconnected" and there you can add your refresh-button and a tooltip suggesting to turn on wifi. When downloading things, refresh is a quick hack, for uploading things the situation is worse, there you should absolutely not pretend that things are done when they are not. Some times i need to know that a file was uploaded 100% before i disconnect the network. Again, the solution is not to add a manual refresh button, here you should always show the sync-progress.