I recently purchased a pixel 9 pro and installed grapheneos not long after. I also put on a ringke magsafe case on it.
When I charge the phone wirelessly on a ugreen magsafe charger or an esr one, it gets very hot (which is normal). But once the phone is fully charged, it still continues to heat up long after. I had set the phone to charge all night and in the morning it was still very hot.
Also I noticed some weird disconnections in the first few seconds of charging wirelessly. It starts and stops the charging a few times before it charges continuously.
Coming from an s24 ultra, I never experienced these issues before. I also did not try the wireless charge with the stock android on the pixel before switching to graphene. I am wondering if there is an issue with the phone itself or the os.