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.
} else {
        clearSuspenseBoundary(
          ((currentParent: any): Instance),
          (node.stateNode: SuspenseInstance),
        );
      }
    } else if (node.tag === HostPortal) {
      if (node.child !== null) {
         
         
        currentParent = node.stateNode.containerInfo;
        currentParentIsContainer = true;
         
        node.child.return = node;
        node = node.child;
        continue;
      }
    } else {
      commitUnmount(finishedRoot, node, nearestMountedAncestor);
       
      if (node.child !== null) {
        node.child.return = node;
        node = node.child;
        continue;
      }
    }
    if (node === current) {
      return;
    }
    while (node.sibling === null) {