During further research yesterday, I came across a thread in the Graphene/OS-Community. Several people there had the same problem with different devices, but especially with Google Pixels. They also recommended disabling 5G/automatic network selection, which I have already done. A moderator suspected that it might be a problem with a specific app/OS combination and mentioned something about Signal’s WebSocket push draining the battery. But in my battery statistics, it seems that Vivaldi consumes the most battery power (which seems quite reliable, at least in comparison to other apps, as I use it most often compared to others). What also bothers me is that my battery statistics seem to be quite inaccurate. They are not reset when I have fully charged my device.
