I just had this same issue. Same thing, changing plugs and back fixed it. Apparently, mine took issue with the surge protector they were plugged into. But now the exact same setup is working after getting it to turn on from another outlet.
Anyone know of any custom enclosures for the fob? As it is stock, it can be dangerous. While hooking up a trailer to my boss’s Model X, the fob was activated by the pressure of my pants while crouched down and hooking up the safety chains, activating Summon. Luckily, the car didn’t move, but it did power up and start flashing the hazard lights, meaning it was ready to move if the front or back buttons would’ve been pressed.
It’s neat that the fob is a miniature car, but the convex shape makes it too easily activated by mistake. The buttons need to be concave in shape so they don’t get pressed by anything else than a finger.