This morning at home, I hooked the usb wireless adapter for a Logitech MK320 keyboard/mouse combo to my Nexus 7 (2013) via a USB OTG and the N7 recognized it immediately and it worked flawlessly. I was thrilled. However, once I got to my office, I plugged in a Logitech K270 wireless mouse/keyboard combo to the N7 (which to me is basically the same product as the MK320) and nothing. So I tried plugging the K270 to my Moto X and it worked! But then back to my N7 and nothing...what's going on?!