I would try moving the switch both ways first, then test it. Then just left or just right and test again. Then the other way and test again... hope it helps!!!!
Covers arrived yesterday. They fit just a little loosely but not so loose that they fall off when you turn the quad upside down and shake it. Plenty good enough IMO.
Mine didn't come with covers, bought drone late May. I have some coming via slow boat from China.
Amazon.com: Anbee 4pcs Motor Protector Cap Cover for DJI Phantom 2 Vision, Phantom 3, Phantom 4, White: Electronics