Elytra bugs

I'm not sure if this is intended or not, but it's impossible to hit yourself with arrows while flying with the elytra (and without it), they just go through the player; that means you cannot achieve infinite flight like you can on the java edition. Also, I noticed that when being projected upwards by, for example, a TNT cannon, the elytra cannot be deployed whilst going up, only when falling, which I think also breaks elytra launchers.