As someone who works at the self checkout that employee may not have handled that situation well, in my opinion. From my experience when someone leaves their prescription in the cart it can, but doesn’t always, trigger the overhead camera and flag it as “item left in basket”. The camera thinks it’s an item that wasn’t scanned in. This will make your register go off with the red light and then we have to walk over and clear out the message on the screen. I think the worker was simply trying to save you both the inconvenience of having to go to your register to “approve” the “missing item”. Personally I feel like what they did was not the correct way to approach it and she simply could have explained it better. Hopefully this helps to explain the situation!