Hi,
On my fresh install of GrapheneOS (PIxel 9 Pro), I realized that my wifi or mobile data keeps deconnecting when I don't use the phone. Usually, 5 minutes after being locked and screen turned black.
I thought it might be the VPN, but no, it also happens even without the VPN enabled.
I don't think it's normal and prevents me receiving messages/notifications unless I use the phone again...