Functional `ref` prop throws a `Maximum update depth exceeded` error when suspending.

React version: `18.0.0-alpha-464f27572-20210713`

## Steps To Reproduce

1. Click on the `suspend` button: https://codesandbox.io/s/ref-set-too-many-times-jm0c3?file=/src/App.js.

## The current behavior

Clicking on the `suspend` button throws a `Maximum update depth exceeded` error.

## The expected behavior

Clicking on the `suspend` button suspends.
if (hostSubtreeRoot === null) {
          hostSubtreeRoot = node;
          const instance = node.stateNode;
          if (isHidden) {
            hideInstance(instance);
          } else {
            unhideInstance(node.stateNode, node.memoizedProps);
          }
        }
        if (enableSuspenseLayoutEffectSemantics && isModernRoot) {
          
          
          
          if (isHidden) {
            safelyDetachRef(node, finishedWork);
          }
          
          if (node.child !== null) {
            node.child.return = node;
            node = node.child;