I think it is pretty intuitive but I'm not opposed to add a section to the docs

In vanilla HTML, the ordering does not matter. So it can be a hidden gotcha.

In vanilla JS, the ordering does matter. So it isn't so hidden.

let obj = { foo: 42 };
let a = {
  foo: 123,
  ...obj,
};
let b = {
  ...obj,
  foo: 123,
};

a and b will have different values in foo and the same applies to props.
But, yeah, there is nothing bad in reminding it in the docs and/or tutorial.