Things with wireless power (small vacuum) are terrific and convenient until they run out of battery or stop holding a significant charge, at which point they become embarrassing
Maybe not what happened to you, but some places hit you with an automatic message when you pull up and it can sound like a person trying to take your order.
I've been to some spots with these. Probably shown in some focus group to make things calmer or faster for folks. I'd want to know if the other employees working the drive through enjoy or hate having an automatic greeting.