To be fair, Apples VPN integration on iOS has been shit for a long time. From the top of my head:

• Leaking IP addresses after connecting the VPN because it doesn’t close the sockets of existing connections
• Randomly turning the VPN off when not actively in use
• No Option whatsoever to force all traffic through the VPN.

~350€ for the 64 Gb Version … Eurozone getting screwed a bit here …