You may be inadvertently activating the Android Beam feature which transfers/shares programs and other information with another computer or tablet in close proximity. They just have to be near each other, not touching.
I did this by putting the new Hisense Sero 7 Pro on the same charger as my Nexus 7-2 overnight. My tablet got a lot of kids games which I had put on the Hisense, and my grandson's Christmas present got a word processor and many other apps which I had installed on the Nexus. I looked it up in the online Nexus manual after being flabbergasted at the 'automatic' information exchange.
Hope this helps.