Thanks for your answers, guys!
233328 All of the 4 conditions are frequently met when I charge my phone every other day or so.
Meaning it's idle while charging, no apps are running and it's connected to WiFi.
matchboxbananasynergy Yes, I confirm that that I only ever used the official Play Store app.
In addition, since the auto-update is not working, I've had to update all the apps manually several times already.
Do you guys have a solution for this?
I wouldn't think it to be complicated, as I'm not using or running anything fancy. Just the regular Play Store app, one GrapheneOS user profile, and popular apps like Signal or Google Maps.
Thanks so much!