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

Notice the flash. I'd expect `suspended` to be `true` during the high pri render.
workInProgress.memoizedState = SUSPENDED_MARKER;
            workInProgress.child = primaryChildFragment;
             
             
            return fallbackChildFragment;
          }
        }
      }
       
       
      const currentPrimaryChildFragment: Fiber = (current.child: any);
      const currentFallbackChildFragment: Fiber = (currentPrimaryChildFragment.sibling: any);
      if (nextDidTimeout) {
         
         
        const nextFallbackChildren = nextProps.fallback;
        const primaryChildFragment = createWorkInProgress(
          currentPrimaryChildFragment,
          currentPrimaryChildFragment.pendingProps,
        );
        primaryChildFragment.return = workInProgress;
        if ((workInProgress.mode & BlockingMode) === NoMode) {
           
           
          const progressedState: SuspenseState = workInProgress.memoizedState;
          const progressedPrimaryChild: Fiber | null =
            progressedState !== null
              ? (workInProgress.child: any).child
              : (workInProgress.child: any);
          if (progressedPrimaryChild !== currentPrimaryChildFragment.child) {