Hendo's chin and ability to hide being wobbled is legendary, but any minute now you can expect this rule to be broken.
Belfort is one of a few guys that can do this, Shogun nearly did but Vitor is firing on all cylinders and utilizing experience well, just like Hendo did before his past couple fights.
Vitor doesn't have the chin nor heart Shogun does. Like I said, Hendo ain't Bisping or Rockhold. When he lands something, Vitor will feel it, and crumble.