This project contains a failing example for facebook/react#20417 (comment)

• Run yarn, followed by yarn serve.
• Observe the issue when removing the comment in Component
• The issue does not occur if observe is left out

I think the exact workings of Mobx are irrelevant, but it is probably interesting to see what the decorator does: https://github.com/mobxjs/mobx/blob/main/packages/mobx-react-lite/src/observer.ts