USB-C to Lighting doesn't fit MacBook charger
I bought a USB-C to lightning cable from Amazon to charge my iPad Pro 10.5" since it supports fast charging.
When I try plugging the USB-C side to the MacBook charger OR the 2016 MacBook Pro charger, it doesn't quite fit and won't charge the iPad. But it *does* fit the port *on* the MacBook Pro and does charge the iPad.
question: is there some sort of key or difference in the MB and MBP charger's ports that requires a special USB-C to lightning cord?
MacBook Pro TouchBar and Touch ID, macOS Sierra (10.12.5), 15" 2.6GHz