Repro: https://codesandbox.io/s/fast-water-4i4jb

Notice the flash. I'd expect `suspended` to be `true` during the high pri render.
workInProgress: Fiber,
  nextChildren: any,
  renderExpirationTime: ExpirationTime,
) {
  
  
  
  
  
  
  
  
  workInProgress.child = reconcileChildFibers(
    workInProgress,
    current.child,
    null,
    renderExpirationTime,
  );
  
  
  
  
  workInProgress.child = reconcileChildFibers(
    workInProgress,
    null,
    nextChildren,
    renderExpirationTime,
  );
}
function updateForwardRef(