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React version:

## Steps To Reproduce

Repro steps using confidential internal fb tool provided separately (https://fb.workplace.com/groups/2299331103613797/permalink/2605716262975278/)

Gist of the repro:
1) open app
2) open react dev tools to profiling tab
3) turn on "Record why each component rendered while profiling"
4) interact with app
5) following error occurs: "TypeError: Cannot read property 'memoizedState' of null"
6) inspecting the flamegraph now shows incomplete information

Based on the stack trace, it looks like the issue occurs specifically on this line:
https://github.com/facebook/react/blob/3e94bce765d355d74f6a60feb4addb6d196e3482/packages/react-devtools-shared/src/backend/console.js#L135
}
      while (node.return) {
        node = node.return;
        if ((node.effectTag & Placement) !== NoEffect) {
          return MOUNTING;
        }
      }
    } else {
      while (node.return) {
        node = node.return;
      }
    }
    if (node.tag === HostRoot) {
       T
       r
      return MOUNTED;
    }
     If we didn't hit the root, that means that we're in an disconnected tree
     that has been u
    return UNMOUNTED;
  }
   This function is copied from React and should be kept in sync:
   https:github.com/facebook/react/blob/master/packages/react-reconciler/src/ReactFiberTreeReflection.js
   It would be nice if we updated React to inject this function directly (vs just indirectly via findDOMNode).
   BEGIN copied code
  function findCurrentFiberUsingSlowPathById(id: number): Fiber | null {
    const fiber = idToFiberMap.get(id);
    if (fiber == null) {
      console.warn(`Could not find Fiber with id "${id}"`);
      return null;