Overheating is due to your iPhone/iPad getting too hot. Generally, your iOS device is overheating more so from the direct sunlight/humidity than the actual temperature. To help prevent this, shade your MLM as much as possible, such as with your golf bag. Make sure all apps are closed out in the background of your device and just the MLM app is running. Taking off the case will also help with your phone not overheating as quickly. Note: Please note iPhones made before the iPhone 11 are more prone to overheating.