This is probably true, tbh. We didn’t have issues with our key fob - if you look at the center console, there’s a little indent where they intend for you store the key fob while you drive. You don’t have to do that though.
If it doesn’t recognize the key fob (which it did for us maybe twice in like four months, because we had left it sitting idle for a while), the car tells you simply to shake the key fob slightly to wake it up. Sometimes I’d just hit the unlock button or the lock and unlock button.
Basically, the key fob eventually falls asleep if left idle, to save battery. Moving it or pressing any button wakes it up.