SKCropNode & child actions - not work

I've created SKCropNode and tried to start action in child node. But action is not started. Below is peace of code:

override func didMove(to view: SKView) {

        let refGround = SKReferenceNode(fileNamed: "fieldGround")!
        let fieldGround = refGround.childNode(withName: "//fieldGround")!
        fieldGround.removeFromParent()
    
        let mask = childNode(withName: "//mask")!
        mask.removeFromParent()
    
        let crop = SKCropNode()
        crop.name = "crop"
        crop.maskNode = mask
        crop.addChild(fieldGround)
        crop.position = CGPoint.zero
        crop.zPosition = 20

        gameWorldNode.addChild(crop)
     
        let actions = SKAction.sequence([SKAction.wait(forDuration: 2),SKAction.rotate(byAngle: CGFloat(90).degreesToRadians(), duration: 5)])

        crop.children[0].run(actions, completion: {
            print("Complete")
        })

}

p.s.: iOS 12.2.6, iPhone 6