iOS 9 App freeze with console log “BKSendHIDEvent”

Question

After app launched for a long time, there are some logs in console while touching the screen:

BKSendHIDEvent: IOHIDEventSystemConnectionDispatchEvent error:0xE

Answer 1

fyi, i'm seeing the same console output "unknown event dropped" after updating to iOS 9.3. I'm not sure if it's the OS, or a specific app running a background process, but I see it in many different apps including the home screen as well as immediately on restarting, so I think it's a bug in the latest 9.3 update.