Hi all. I've been using GrapheneOS for a week now and I have the need to use Whatsapp. I installed it with the apk on their website using obtainium. Before installing it, I made some research and I figured Whatsapp uses a different method to deliver push notifications when Google Play Services are not installed. It works fine for a while but after some time, notifications stop working properly. I also set unrestricted under battery settings for Whatsapp. Am I missing something? Thanks!