Some users of the new iPad Pro are finding the device becomes unresponsive after being charged for a lengthy period, requiring a hard restart to restore functionality, MacRumors reports. Dozens of MacRumors forum users claim that the large tablet appears frozen after overnight charging, forcing them to restart the device. The issue has affected 32GB and 128GB versions running iOS 9.1 and is present in both Wi-Fi and cellular models. Users have speculated…