Half, maybe more of the melee enemies encountered in the game do the same thing - charge, leap, teleport to the back of the player. Then they do it again. Over and over. This is especially evident in the arena.
I understand why this is a thing, ranged characters must be punished in some way (even though sentinels have been the best class for some time) but it does feel boring to see the same enemy tactics over and over when ranged enemies are definitely more varied.