Child node not keeping same physicsBody when added to parent - sprite-kit

Question

Using the Xcode SpriteKit Scene editor I have a few objects added to the scene as "obstacles." I like to animate them across the screen. They are not dynamic. To make things easier I thought to add them to an obstacleParent node and just animate that one object. The problem is that adding the obstacles to a parent totally screws up their physics bodies. Meaning the obstacle physics bodies do not match the outline of the sprite.

Answer 1

I'm not sure if it is a bug in the Scene editor, but adding the physics bodies programmatically yields results as expected.
Some interesting things worth noting are:
the physicsBodies moved with the parent regardless of if they were not Dynamic or not.
I could not get them to overlap each other until I made them all have the same contactTestBitMask
It is difficult to tell in the screen shot but all 3 children kept their physics shapes
If the parent has a physics body and an physics impulse is applied to it, only the parent moves. However setting the position of the parent programmatically moves the parent and child nodes
testObject = SKSpriteNode(texture: nil, color: .greenColor(), size: CGSize(width: 100, height: 100))
testObject.zPosition = Layer.Controls.rawValue
testObject.position = CGPoint(x: self.size.width / 2, y: self.size.height / 2)
// testObject.physicsBody = SKPhysicsBody(circleOfRadius: testObject.width / 2)
// testObject.physicsBody!.dynamic = true
// testObject.physicsBody!.affectedByGravity = false
// testObject.physicsBody!.allowsRotation = true
addChild(testObject)
let testerObject = SKSpriteNode(texture: nil, color: .clearColor(), size: CGSize(width: 100, height: 100))
testerObject.zPosition = Layer.Controls.rawValue
testerObject.position = CGPoint(x:50, y: 50)
testerObject.physicsBody = SKPhysicsBody(circleOfRadius: testerObject.width / 2)
testerObject.physicsBody!.affectedByGravity = false
testerObject.physicsBody!.dynamic = true
testerObject.physicsBody!.allowsRotation = true
testerObject.physicsBody!.collisionBitMask = 0
testerObject.physicsBody!.contactTestBitMask = 0
testObject.addChild(testerObject)
let testerObject2 = SKSpriteNode(texture: nil, color: .clearColor(), size: CGSize(width: 100, height: 100))
testerObject2.zPosition = Layer.Controls.rawValue
testerObject2.position = CGPoint(x:-50, y: -50)
testerObject2.physicsBody = SKPhysicsBody(circleOfRadius: testerObject.width / 2)
testerObject2.physicsBody!.affectedByGravity = false
testerObject2.physicsBody!.dynamic = true
testerObject2.physicsBody!.allowsRotation = true
testerObject2.physicsBody!.collisionBitMask = 0
testerObject2.physicsBody!.contactTestBitMask = 0
testObject.addChild(testerObject2)
let testerObject3 = SKSpriteNode(texture: nil, color: .clearColor(), size: CGSize(width: 100, height: 100))
testerObject3.zPosition = Layer.Controls.rawValue
testerObject3.physicsBody = SKPhysicsBody(circleOfRadius: testerObject.width / 2)
testerObject3.physicsBody!.affectedByGravity = false
testerObject3.physicsBody!.dynamic = true
testerObject3.physicsBody!.allowsRotation = true
testerObject3.physicsBody!.collisionBitMask = 0
testerObject3.physicsBody!.contactTestBitMask = 0
testObject.addChild(testerObject3)