iOS 15 with YNAB 4 (Classic)
Just FYI to anyone who may end up searching the forum - after installing iOS 15 (currently in beta), the YNAB Classic App (for use with the desktop YNAB 4) has some UI issues reloading/re-syncing budgets. After deleting and re-installing the app, the issue has persisted.
When syncing a new budget or you get the 'desktop has changed we need to re-load the budget' message, after selecting a budget, it 'appears' to freeze. However, what I believe is happening is the graphic for the sync progress is just not showing and it also doesn't auto-load the budget screen when it's done. But I it seems to 'work' OK anyway.
If you just let it sit there for a few minutes (depending on how long you think the sync might take) and close and re-open the app, all is good. The budget works fine. I hope the final release of iOS 15 doesn't have this behavior... but wouldn't be surprised if it did.