getSnapshot returning inconsistent results

[MiroslavGannoha]

Bug report

• I've checked documentation and searched for existing issues
• I've made sure my project is based on the latest MST version
• Fork this code sandbox or another minimal reproduction.

Sandbox link or minimal reproduction code
https://codesandbox.io/embed/snowy-dawn-c7elr

import { types, getSnapshot, applyPatch, applySnapshot } from "mobx-state-tree";

const Product = types.model("Product", {
  price: 0,
  id: types.identifier
});

const Cart = types.model("Cart", {
  products: types.array(Product)
});

const UserStore = types.model("Store", {
  user: "Some User",
  cart: types.optional(Cart, () =>
    Cart.create({
      products: [Product.create({ price: 1, id: "111" })]
    })
  )
});

const userStore = UserStore.create();
console.log(
  "before Patch - snapshot: ",
  getSnapshot(userStore).cart.products[0]
);
// before Patch - snapshot:  Object {price: 1, id: "111"}

applyPatch(userStore, {
  op: "replace",
  path: "/cart/products/0/price",
  value: 2
});
console.log(
  "after Patch - userStore snapshot (WRONG): ",
  getSnapshot(userStore).cart.products[0]
);
// after Patch - userStore snapshot (WRONG):  Object {price: 1, id: "111"}

console.log(
  "after Patch - products snapshot (OK): ",
  getSnapshot(userStore.cart.products)[0]
);
// after Patch - products snapshot (OK):  Object {price: 2, id: "111"}

applySnapshot(userStore.cart.products, [{ price: 3, id: "111" }]);
console.log(
  "after applySnapshot - userStore snapshot (NOW OK): ",
  getSnapshot(userStore).cart.products[0]
);
// after applySnapshot - userStore snapshot (NOW OK):  Object {price: 3, id: "111"}

Describe the expected behavior
getSnapshot should return updated price both times

Describe the observed behavior
getSnapshot returning default or updated value depending on node level

P.S. I should've not probably do
products: [Product.create({ price: 1, id: "111" })]
and instead do
products: [{ price: 1, id: "111" }]
or
products: [getSnapshot(Product.create({ price: 1, id: "111" }))]
But still it should produce some warning or error. Not very obvious thing.