I know this is a bit more tech-support oriented, but I was hoping someone might have first or second hand experience fixing this, given what a nightmare it is to research and test.
I’m using a semi-recent Samsung phone, running their skin of Android 14. Currently, I’m using PIA as my vpn (yes, I know I should switch) through the OpenVPN app. I also experience this issue through PIA’s app leading me to think its an Android issue. I also leave both the “Always-on VPN” and “Block Connections without a VPN” enabled.
I’ve tried to do some research, but everything that I find is search engines directing to basic stuff like how to connect to wifi
Edit: I’m currently testing the memory management tweak, and Ill probably try wireguard next.
Have you tried a different vpn to see if the issue is with the app? I use Proton vpn, works like a charm. You could also lock the app from being shut down. Also, check power settings for the app, maybe it is automatically shut down to save power consumption.