> ## Documentation Index
> Fetch the complete documentation index at: https://docs.upstackdata.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Events were flowing but suddenly stopped

> Events stopped appearing after a theme change? Shopify resets app embeds when you publish or update a theme. Re-enable the Upstack Data embed and test in an incognito window.

**Likely cause:** A recent theme update or theme switch disabled the Upstack app embed. Shopify resets app embeds when you publish a new theme.

**Fix:**

1. Check whether you recently published a new theme or updated your existing theme. In Shopify admin, go to **Online Store → Themes** and note the active theme name.
2. Click **Customize** on the active theme, open **App embeds**, and re-enable the **Upstack Data** embed.
3. Click **Save** and test with an incognito window.
4. If you use a staging/draft theme, remember that app embeds must be enabled separately on each theme before publishing.

***

**Still stuck?** Contact [support@upstackdata.com](mailto:support@upstackdata.com) with your Pixel ID and a description of the issue. We typically respond within a few hours.

## Related guides

<CardGroup cols={2}>
  <Card title="Enable theme extension" icon="toggle-on" href="/guides/shopify/how-to-ensure-upstack-data-theme-app-extension-is-enabled">
    Verify the Upstack Data theme app extension is enabled in your Shopify theme editor.
  </Card>

  <Card title="Pixel stuck on “Waiting for first events”" icon="hourglass" href="/troubleshooting/pixel-stuck-on-waiting-for-first-events">
    Fix a dashboard stuck waiting for its first events after installation.
  </Card>
</CardGroup>