Once Upon ... in Hollywood/ Musso & Frank Salt shaker

Loved this movie, love QT’s work. In the lunch scene at Musso & Frank I noticed that the salt shaker on the dining table is half full, which would be unusual in real life. Musso & Frank’s service staff have an excellent reputation, I assume earn well and I believe it is unlikely that a salt shaker there would be half full. Restaurant staff refill their S&P every day, and for a salt level to be this low, would take about a half a week of inattention. I also believe that given the quality and attention to detail of the set design and set dressing, that this was not random. Has anyone else noticed this odd detail, and if so what are your thoughts? Thank you.

image