Phantom notifications at same time everyday
Hi, everyday at 17.01 exactly my iPhone 8 will make the tri-tone notification numerous times in succession but there are no new messages or app notifications. This also happens randomly through the day, though when this happens the tritone only sounds once or twice. I have checked notification settings and there are no apps that are set to ‘sound’ only ( ie without banners or badges also being turned on). This is driving me crazy! Any help would be appreciated.
iPhone 8 Plus, iOS 14