[Bug]: Cannot handle dynamic content

[github-gamma]

crawl4ai version

1.6.3

Expected Behavior

return dynamic content

Current Behavior

get an "Error: list index out of range", when re-use the same crawler session

Is this reproducible?

Yes

Inputs Causing the Bug

Steps to Reproduce

Code snippets

import asyncio
from crawl4ai import AsyncWebCrawler, CrawlerRunConfig

async def main():
    # Step 1: Load initial Hacker News page
    config = CrawlerRunConfig(
        wait_for="css:.athing:nth-child(30)"  # Wait for 30 items
    )
    async with AsyncWebCrawler() as crawler:
        result = await crawler.arun(
            url="https://news.ycombinator.com",
            config=config
        )
        print("Initial items loaded.")

        # Step 2: Let's scroll and click the "More" link
        load_more_js = [
            "window.scrollTo(0, document.body.scrollHeight);",
            # The "More" link at page bottom
            "document.querySelector('a.morelink')?.click();"  
        ]

        next_page_conf = CrawlerRunConfig(
            js_code=load_more_js,
            wait_for="""js:() => {
                return document.querySelectorAll('.athing').length > 30;
            }""",
            # Mark that we do not re-navigate, but run JS in the same session:
            js_only=True,
            session_id="hn_session"
        )

        # Re-use the same crawler session
        result2 = await crawler.arun(
            url="https://news.ycombinator.com",  # same URL but continuing session
            config=next_page_conf
        )
        total_items = result2.cleaned_html.count("athing")
        print("Items after load-more:", total_items)

if __name__ == "__main__":
    asyncio.run(main())

OS

windows 10

Python version

3.13

Browser

Chromium

Browser version

136.0.7103.25

Error logs & Screenshots (if applicable)