My new i7 13" macbook pro goes to sleep without warning if it gets too close to my old (sleeping) macbook. Is there an EMI/shielding issue I need fixed?

My new i7 13" macbook pro goes to sleep without warning if it gets too close to my old (sleeping) macbook. Is there an EMI/shielding issue I need to address?

I discovered this while I was still working on both in parallel. (Still getting files and stuff switched over). I'm not too concerned if it only occurs when I stack one directly on the other, but I will be very upset if somebody can walk by me with a clunky EMI radiator PC and put my mac to sleep without warning.

Anybody else find this sneaky little fault?