What I expected to happen was that the armor stand should have got the rotation of the player.
But, what actually happened is that the armor stand doesn't seem to get the player's rotation and it's like nothing happens even though the command output says the armor stand was teleported to the player.

Steps to Reproduce:
1. Create scoreboard objective: scoreboard objectives add obj dummy
2. On a chain put the following commands:

execute @e[score_obj_min=1] ~ ~0.5 ~ summon ArmorStand ~ ~ ~ {Tags:[ARM],NoGravity:1}

execute @e[score_obj_min=1] ~ ~ ~ tp @e[tag=ARM,c=1] @p

scoreboard players reset @e[score_obj_min=1] obj