@Martijnforlife @ZacksJerryRig@SamsungMobileUS Try deleting cache and data of play service.
When nothing helps try a factory reset.
Don't think that theres a hardware defect
@Martijnforlife @ZacksJerryRig@SamsungMobileUS 3T has OIS, so the noise should be normal. There isn't much in a Smartphone that can move anyways.
The heating started after nougat, right?
@Martijnforlife @ZacksJerryRig@SamsungMobileUS I don't know how it sounds. But if you have OIS its quite normal. Tab next to the camera and listen if makes noises.