And yet another fan added: "Where is Meghan Markle? She seems awfully quiet these days."
They also referenced a 2012 video campaign of Markle opening up about her experiences of racism, adding: "Where is she now? I don't see her speaking about what's happening now."
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Markle was yet to meet Harry when she filmed the clip and shared her hopes for a more "open-minded" society that can learn to see the beauty in a "mixed world".
Speaking to the camera, Markle shares: "I'm biracial, most people can't tell what I'm mixed with and so much of my life has felt like being a fly on the wall.
"And so some of the slurs I've heard, the really offensive jokes or the names, it has just hit me in a really strong way. A couple of years ago I heard someone call my mum the N-word.
"So I think for me beyond being personally affected by racism, to see the landscape of what our country is like right now and certainly the world and to want things to be better."
While Harry and his wife have kept quiet on their social media platforms, the Queen's Commonwealth Trust (QCT) which is overseen by the Queen, Prince Harry and Meghan, shared on Instagram and Twitter a poignant Martin Luther King Jr quote: "Injustice anywhere is a threat to justice everywhere."