Follow nested objects malposition

[mrtoorich]

const planet1 = new PIXI.Sprite()
const planet2 = new PIXI.Sprite()
const planet3 = new PIXI.Sprite()

planet1.anchor.set(0.5)
planet2.anchor.set(0.5)
planet3.anchor.set(0.5)
planet1.position.set(0, 0)
planet2.position.set(100, 100)
planet3.position.set(50, 50)

viewport.addChild(planet1)
planet1.addChild(planet2)
planet2.addChild(planet3)

When viewport.follow(planet3), it follows (50, 50) not (150, 150).