Testing react 18 im getting this error 

![Screenshot from 2021-11-12 07-33-44](https://user-images.githubusercontent.com/86263126/141428205-3f3b3f67-e235-44ef-ae1a-5c42e4f7800a.png)


React version: https://unpkg.com/react-dom@18.0.0-alpha-a44a7a2a3-20211111/umd/react-dom.development.js

wants to add that in this version: https://unpkg.com/react-dom@18.0.0-alpha-05726d72c-20210927/umd/react-dom.development.js no happens, so probably a recent change affected this

File Related: https://github.com/facebook/react/blob/1bf6deb865052111474f2988bb831de13d09c560/packages/react-reconciler/src/SchedulingProfiler.js

## Steps To Reproduce

cant reproduce this for the moment, happens randomly and had to downgrade the version

Link to code example:

cant reproduce it, happens randomly

## The current behavior

in some cases is undefined

## The expected behavior

should not be undefined 
if (enableSchedulingProfiler) {
    if (supportsUserTimingV3) {
      const componentName = getComponentNameFromFiber(fiber) || 'Unknown';
      
      markAndClear(`--component-passive-effect-unmount-start-${componentName}`);
    }
  }
}
export function markComponentPassiveEffectUnmountStopped(): void {
  if (enableSchedulingProfiler) {
    if (supportsUserTimingV3) {
      markAndClear('--component-passive-effect-unmount-stop');
    }
  }
}
export function markComponentLayoutEffectMountStarted(fiber: Fiber): void {
  if (enableSchedulingProfiler) {
    if (supportsUserTimingV3) {
      const componentName = getComponentNameFromFiber(fiber) || 'Unknown';
      
      markAndClear(`--component-layout-effect-mount-start-${componentName}`);
    }
  }
}
export function markComponentLayoutEffectMountStopped(): void {