Continuity mistake: During the fight with Zhou Cheng, Cheng does a forward flip and kicks Danny, making him stumble backwards. In the shot of Cheng lying on the ground, Danny is holding his stomach. In the shot immediately afterwards, he's holding his chest.
Continuity mistake: When Davos has one of the guys pinned down on the ground with him, you see the knife next to him, above his shoulder, mostly on the grey tiles. But in the next shot when he reaches for it, the knife is in a different position. It's next to him (so Davos only has to reach his hand over to the side and not above) and resting halfway on the grey and yellow tiles.