It doesn't normally bother me but on her recent vlog she went to Balthazar for brekfast and went on that the service wasn't good but had previosuly mentioned that they were 'serverely late' for their booking and 'didn't know' if they would let them in because of how late they were.
I think this annoyed me so much as I work in hospitality and people being late really does impact the way a place runs which I feel is something she is totally oblivious to. By the way she was talking it didnt seem like they had even phoned the restaurant to let them know what they were going to be late which is completely out of order (she may well have let the restaurant know but by the way she was speaking it didn't sound like they did).
But I do understand what you mean; for me she flicks between seeming like a lovely customer and then a pain in the arse at the same time