The scores of my geekbench test on my iPhone 12 phone are low, the device cannot pass the test in Apple support diagnosis. My phone's 1.5-year-old battery health is 84%, it never turned on, Apple directed it to support, but I don't want to take it to support, sometimes it gives a heating warning in the applications, tiktok or something doesn't give a heating warning on the device. Has anyone experienced the same situation?