Assassin's Creed Shadows level 7 domain with Yasuke

What the hell happens towards end of boss fight? I've never been backed up and got stuck like that. I've fought that dude many times and that never happened before. Don't forget the higher you get in the domains the more the modifiers matter unless your build is solid. You can get tons of tokens doing the corrupted castles and just reroll when you get a bad set of modifiers.