Play Framework 2.6 CSRF and Session

I got strange issue. I'm implementing cart functionality on my website and I use session to store cart positions. I have a POST action to add new position to cart, and I have CSRF filter enabled to secure website. I call it with ajax on a product page, so first call is okay, but second says Unauthorized and in logs there are [CSRF] Check failed because no token found in headers for /cart. But it has. I call it with:

 $("form").submit(function(e){
        e.preventDefault();
        $.ajax({
            url: '/cart',
            method: 'POST',
            data: getCartPosition(),
            beforeSend: function(xhr){xhr.setRequestHeader('Csrf-Token', $('input[name=csrfToken]').val());},
            success: function (data, textStatus) {
                alert('Added!');
            },
            error: function (error) {
                alert('Error!');
            }
        });
    });

and I put CSRF token in template somewhere:

@CSRF.formField

and it's in request:

I have enabled this in config

play.filters.csrf.bypassCorsTrustedOrigins=true 
play.filters.hosts {
  # Allow requests to example.com, its subdomains, and localhost:9000
  allowed = ["localhost:9000", "localhost:4200"]
}

But what is strange that it seems it puts csrfToken in session, because after failed request I have session like this

Session(Map(cart -> {"positions":
[{"trackId":1},{"trackId":24},{"trackId":20}]}, 
username -> user, 
token -> 0639d0b0-e7c8-4e82-9aad-2a43044e72db, 
csrfToken -> e705413843ea96a6491a0e9e800ba36a712c4f70-1506542471068-0baeef7535eb9c889fb6fed2))

Idk why it's there, my add2cart action looks like:

private def cartAction(addToCartForm: Form[CartPosition], action: (Cart, CartPosition) => Cart)(implicit request: UserRequest[Any]) = {
    addToCartForm.fold(
      _ => BadRequest("Error!"),
      position => {
        getCart match {
          case Some(cart) => Ok("Ok").withSession("cart" -> Json.toJson(action(cart, position)).toString(), "username" -> request.session.get("username").getOrElse(""), "token" -> request.session.get("token").getOrElse(""))
          case _ => Ok("Ok, no").withSession("cart" -> Json.toJson(action(Cart(Seq.empty), position)).toString())
        }
      }
    )
  }

def addToCart() = guestAction { implicit request =>
    cartAction(addToCartForm.bindFromRequest, addCartPos)
  }

and addCartPos just adds position to json