Meghan Markle’s former aide Samantha Cohen is shedding some light onto the allegations that the Duchess of Sussex “bullied” her staff. In a new interview, Cohen confirmed she was one of 10 royal employees who was part of Buckingham Palace’s 2021 investigation. Cohen — who worked for Queen Elizabeth II for more than 15 years before taking on the Sussexes and then quitting in 2019 — stayed tight-lipped on the details of the ordeal, but she did hint that the Suits alum and Prince Harry may have been difficult to work for. “I was only supposed to stay for six months but stayed for 18 — we couldn’t…