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

Notice the flash. I'd expect `suspended` to be `true` during the high pri render.
if (!didWarnAboutContextTypeOnFunctionComponent[componentName]) {
        console.error(
          '%s: Function components do not support contextType.',
          componentName,
        );
        didWarnAboutContextTypeOnFunctionComponent[componentName] = true;
      }
    }
  }
}
const SUSPENDED_MARKER: SuspenseState = {
  dehydrated: null,
  retryTime: NoWork,
};
function shouldRemainOnFallback(
  suspenseContext: SuspenseContext,
  current: null | Fiber,
  workInProgress: Fiber,
) {
  
  
  return (
    hasSuspenseContext(
      suspenseContext,
      (ForceSuspenseFallback: SuspenseContext),
    ) &&
    (current === null || current.memoizedState !== null)
  );
}
function getRemainingWorkInPrimaryTree(