Not working properly on new iOS – 91VPN Review

This app works very well on my old iPhone 6. However, it keeps loosing connection on my newer iPhone X. I am not if it is a phone problem or OS problem. What I see on my iPhone X is that after enabling vpn, the icons on the upper right corner keep changing from WiFi to VPN to 4G symbols when I am trying to load a page. It is very strange that it even causes my WiFi to disconnect! My VPN server is connected through V2Ray with tls and websocket if that matters. My friend also experienced the same problem.
Review by JiangnanAaaaa on 91VPN.