Meghan Markle is focused on her humanitarian work, but royal observers noticed the Duchess of Sussex suffered a wardrobe malfunction while at the Children’s Hospital Los Angeles’ Literally Healing event on Thursday, March 21. The appearance was a part of the organization’s Make March Matter fundraising initiative, which “unites celebrities, business and the greater community in support of its mission of creating hope and building healthier futures.” The Duchess of Sussex sported Oscar de la Renta’s silk-chiffon Landscape shirtdress (worth $3,414) to read to children at the hospital, but social…