> For the complete documentation index, see [llms.txt](https://cmp.docs.sirdata.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cmp.docs.sirdata.net/en/consent-transmission-standards/google-consent-mode/fix-implementation-errors/late-update-signal.md).

# Late \`update\` signal

#### Description

The `update` signal in Google Consent Mode is sent **too late** — meaning **after the maximum allowed wait time** for Google tags (typically 500 ms). When this happens, tags may fire without taking the user’s choice into account, reducing the effectiveness of Consent Mode.

#### Possible causes

1. If the Consent Mode script is **hardcoded into the page**:
   * The script uses the `defer` attribute, which **delays execution**;
   * The script is **altered, cached, or delayed** by an optimization system such as **Rocket Loader** (Cloudflare), a CDN, or a performance plugin.
2. If Consent Mode is managed via **Google Tag Manager**:
   * The **“Wait for update”** (`waitForUpdate`) setting has a **timeout that is too short**, causing tags to fire before the `update` signal is received.

#### What to check

**If you are not using Google Tag Manager:**

* Make sure the script is **not loaded with `defer`** ;
* Disable or configure any third-party system (e.g., Rocket Loader) that may delay or cache the script.

**If you are using Google Tag Manager:**

* Open the relevant tag (e.g., Analytics or Ads) ;
* Enable the **“Wait for update”** option ;
* Increase the timeout value — e.g., **800 ms or 1000 ms** — in the appropriate field.

<figure><img src="/files/Tu18lhSRlpeHrr9UdcOG" alt=""><figcaption></figcaption></figure>


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