SKAction not working on SKSpriteNode

SKAction

on mine SKShapeNode

doesn't work, code doesn't execute and node doesn't move even if console logs "Snake is moving". Is it because node is an SKScene property and the actions are part of the lower scope functions?

class LevelScene: SKScene, SnakeShower {

    var snake: Snake {
        let theSnake = Snake(inWorld: self.size)
        return theSnake
    }

    override func didMove(to view: SKView) {
        self.backgroundColor = .green
        snake.delegate = self
    }

    var myNode: SKShapeNode {
        let node = SKShapeNode(rectOf: snake.componentSize)
        node.position = snake.head
        node.fillColor = .red
        return node
    }

    func presentSnake() { // function called by the snake in the delegate (self)
        self.addChild(myNode)
        startMoving()
    }

    func startMoving() {
        print("snake is moving")
        myNode.run(SKAction.repeatForever(SKAction.sequence([
            SKAction.move(by: self.snake.direction.getVector(), duration: 0.2),
            SKAction.run({
                if self.myNode.position.y > (self.size.height / 2 - self.snake.componentSize.height / 2) {
                    self.myNode.removeAllActions()
                }
            })
        ])))
    }
}

      

        
        
        
      

    

It worked when the property was declared in the same function as the action