Can't see anything in this video:
https://twitter.com/user/status/1465091314391867396
After Duke initiates contact, Duke and Lemon were only face to face for about a half second before the ref intervenes and Duke walks away, following which Lemon circles around and shoves him the facemask. You'd think with HD cameras right there you would have been able to see it. Sankey was right there as well so I wonder if he also saw it.