Proton VPN iOS: Needs to manually disconnect and reconnect from time to time

This usually happens when I come back to my home. I am 100% sure the ISP doesn't block VPN and I can connect to Proton VPN from my home wifi.

However, it happened too many time that my internet connection does not work at all when I arrive home. (I have "Kill Switch" option on and it's important for me). I open Proton VPN iOS app and click on the connection, the "VPN IP" is "disconnected". If I disconnect and connect again, everything just works normally.

Does this match your user experience? or am I missing something?