Bought an iPad mini 4 last week, love the device, but the lightning connector seems 'loose'. I have an iPhone 5 and 6s and when I plug a connector, it makes a click. The iPhone is "firmly" attached to the connector. I can pull the cord and the iPhone will be dragged along. But for this iPad mini 4, the lightning connector doesn't make a click and can be very easily pulled out. Is that normal?