Component with shouldComponentUpdate won't get re-rendered when its parent component is updated at the same time

[kmxz]

Reproduced with Preact 10.11.3.

Describe the bug

For a component with shouldComponentUpdate (for example, a PureComponent), calling setState with a new state value does not cause it to re-render, if the parent component is updated at the same time.

To Reproduce

https://codepen.io/kmxz/pen/bGjzvbR

Expected behavior

In the example above, the new state.text value "Child-NEW" should be rendered, instead of the stale state.text value "child-old".

Rendering the exact same demo code using React gives the correct behavior (https://codepen.io/kmxz/pen/rNrPJEq).

[JoviDeCroock]

Hey, thank you for the accurate reproduction this was an error in how we deal with strict equality and we have a fix lined up in #3884