locator.count() returns 0 for valid XPath selector while isVisible() works correctly

[XSUV]

import "dotenv/config";
import { Stagehand } from "@browserbasehq/stagehand";

async function main() {
  const stagehand = new Stagehand({
    env: "LOCAL",
    disableAPI: true,
    verbose: 0 
  });
  await stagehand.init(); 
  const page = stagehand.context.pages()[0];

  // 主执行函数
  async function test() {
    await page.goto("https://www.stagehand.dev/");
    const selector = page.locator("//img[@alt='Stagehand']")
    const count = await selector.count();
    const visible = await selector.isVisible()
    console.log("🚀 ~ test ~ count:", count,visible)
  }
  await test()
}

main().catch((err) => {
  console.error(err);
  process.exit(1);
});

package.json

{
  "name": "my-stagehand-app",
  "type": "module",
  "scripts": {
    "build": "tsc",
    "start": "tsx index.ts"
  },
  "dependencies": {
    "@ai-sdk/openai-compatible": "^1.0.30",
    "@browserbasehq/stagehand": "^3.1.0-alpha-a7d29decee0f7d12e2437267b9eef1795d3b4e3a",
    "dotenv": "^16.4.7",
    "openai": "^6.17.0",
    "zod": "^4.3.6"
  },
  "devDependencies": {
    "tsx": "^4.19.2",
    "typescript": "^5.0.0"
  }
}

[XSUV]

$x("//img[@alt='Stagehand']")