Tracked array not causing re-render when updated in Octane project

[JonForest]

Referencing a conversation with @pzuraq on the Discord #help channel.

I have a component that is updating a particular ember data model within an array of models within an action. The template is not updating, even though this array is used within getters that are in turn used within the template.

Component code is here:

export default class BehaviourGrid extends Component {
  @tracked behaviours

  constructor (owner, args) {
    super(...arguments)
    this.behaviours = args.behaviours.slice(0)
  }

  get unallocated() {
    return this.behaviours.filter(behaviour => behaviour.list === 'unallocated')
  }

  get self() {
    return this.behaviours.filter(behaviour => behaviour.list === 'self')
  }

  // ... other getters
  @action
  moveBehaviour(toList, id) {
    const behaviour = this.args.behaviours.find(behaviour => behaviour.id === id)
    behaviour.set('list', toList)
    // Fire the setter
    this.behaviours = this.behaviours
  }
}

If I output a length of this.unallocated before and after the set in the action then I can see it is being updated, but no template re-render.

The git repo is here (super simple for easy reproduction): https://github.com/JonForest/leadership-quiz

[rwjblue]

@JonForest - I believe this should have been addressed by #17751, would you mind updating to the latest canary build and confirming?

[JonForest]

Awesome, that's got it. Thank you.