They talked to the CM scanning and explained why they were late, and he said they can't make exceptions, then almost immediately made an exception for the same situation as they were walking away and still in earshot. I assume he thought they couldn't hear him still.
I agree that most CM's wouldn't treat people differently based on age, and there could have been some unheard factor. I told her to let it go and enjoy the night.
That said, on our last visit, I personally witnessed a CM treat our other daughter very differently in a wheelchair than people standing near her in the same spot, leaving her in tears, but that's not something I want to get into here. CM's are prone to mistakes and biases just like everyone else, so we try to be forgiving/understanding and move on.
It was the person scanning the VQ pass. I have zero proof that age was a factor, but if it wasn't age, it was some other unknown factor. The bottom line is that nobody should count on an exception when planning their day.