I don't remember any padded leg wraps.
Last time I heard a leg wrap controversy was the last time George Sotiropoulos fought. Joe Lauzon Questions George Sotiropoulos' Controversial Fight Wear
George is later interviewed by Helwani and says that even shorts add friction, it is up to the commission.
They force fighters to wrap any open cuts or abrasions, maybe his knees were cut up under those wraps.