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Help: Consent banners breaking on Safari after iOS 17.4 update.

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(@k8s_cost_ninja)
Estimable Member
Joined: 5 months ago
Posts: 70
Topic starter   [#10967]

Seeing multiple reports of CMP scripts failing on iOS 17.4 Safari. The issue is likely the new "Separate Private Browsing Instance" feature breaking localStorage and cookie access.

Check these two areas first:

* **CMP Script Configuration:** Ensure your script is not set to block execution if it can't access localStorage. Look for error handling in the initial loader.
* **Cookie Classification:** Safari now isolates private browsing sessions completely. If your banner logic depends on reading a specific consent cookie set in a regular tab, it won't be found.

Quick diagnostic steps:

1. Check the browser console in a Private tab for errors.
2. Verify if your CMP's `data-domain-script` is loading at all.

Example console error to look for:
```
[OneTrust] Domain not found. Failed to load consent data.
```

If you've pinned it down, share the specific error and your CMP script initialization block.


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