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

Notice the flash. I'd expect `suspended` to be `true` during the high pri render.
if (
      current === null ||
      (current.memoizedState: null | SuspenseState) !== null
    ) {
      
      
      
      
      
      if (
        nextProps.fallback !== undefined &&
        nextProps.unstable_avoidThisFallback !== true
      ) {
        suspenseContext = addSubtreeSuspenseContext(
          suspenseContext,
          InvisibleParentSuspenseContext,
        );
      }
    }
  }
  suspenseContext = setDefaultShallowSuspenseContext(suspenseContext);
  pushSuspenseContext(workInProgress, suspenseContext);