mobx-state-tree: Performing Actions on recently created objects on a reference does not trigger `onSnapshot` for the store.

I have:

• I think something is not working as it should.
  • I’ve checked documentation and searched for existing issues
  • I’ve made sure your project is based on the latest MST version
  • Fork this code sandbox or another minimal reproduction.
  • Describe expected behavior
  • Describe observed behavior

I am running into an issue with performing an action on a reference not triggering the “onSnapshot” call in our store.

I am able to reproduce this in a simple store example: https://codesandbox.io/s/rrk8wojnp4

Observed behavior: When loading the initial store, I want to perform an action on one selected todo. this selected todo is stored as a reference to a todo in the todos array. When I perform the toggle action using the reference you can see that there is no snapshot logged. Just a second later if I perform that same action directly on the item instead of via the reference, that action gets logged and can be stored.

Expected behavior: Performing an action on the referenced todo should trigger a snapshot, just the same as performing that action directly on the item.

I am still pretty new to this library so I might be misunderstanding how references are supposed to work or be used.