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

Notice the flash. I'd expect `suspended` to be `true` during the high pri render.
currentPrimaryChildFragment.childExpirationTime,
          renderExpirationTime,
        );
         
         
        workInProgress.memoizedState = SUSPENDED_MARKER;
        workInProgress.child = primaryChildFragment;
        return fallbackChildFragment;
      } else {
         
         
        const nextPrimaryChildren = nextProps.children;
        const currentPrimaryChild = currentPrimaryChildFragment.child;
        const primaryChild = reconcileChildFibers(
          workInProgress,
          currentPrimaryChild,
          nextPrimaryChildren,
          renderExpirationTime,
        );
         
         
         
         
         
         
        workInProgress.memoizedState = null;
        return (workInProgress.child = primaryChild);
      }
    } else {