The one that irks me is how some apps that have already established a connection can ignore the VPN. I always wondered about that, like if I enabled my VPN, what happens to existing connections. One thing I couldn’t find is what apps can do this? If it’s third party apps, that’s pretty serious. But if it’s just Apple apps or default ones, that’s a far less of a concern seeing as Apple seems to bypass VPN anyway for its in-house wares.