Only trash like Nature are sensationalist enough to squeeze the word "flummox" into the title of this article. The TLDR is that the experimenters tried and fail

Only trash like Nature are sensationalist enough to squeeze the word "flummox" into the title of this article. The TLDR is that the experimenters tried and failed to demonstrate a gaping flaw in quantum mechanics, which is widely accepted by pretty much everyone. No flummoxing occurred, except in the minds of Nature's editorial staff. These results were expected, agree nicely with theory, and should be nothing but reassuring with regards to our understanding of QM.