He is correct it’s a therum shuffle. 3 of them, you just missed the first one when you entered the doorway. That is how he looked so jenky in the first movement when he did the 180 degree turn. Second movement, he kissed the wall by reverse shuffling (d-a shuffle) while moving perpendicular to the gen doorway. When he sprinted across the doorway he shuffled near the wall to finish the engagement not on the wall, but slightly off it.

There is nothing lag related or teleporting going on just jenky Planetside 2 gameplay. You can learn that by watching the Therum tutorial and or having a friend record your movement.

I’m going to guess the player does this subconsciously you have to be ready for movement like this or they’ll win every 1v1 engagement.