TikTok Pixel attribution breaks across Mews iframe checkout — anyone solved this?

Yes, this is a known challenge with cross-domain tracking when the Booking Engine confirmation page loads on app.mews.com . Mews supports adding a GTM container to the Booking Engine, but TikTok Pixel and other third-party tags must be configured within that container by the property or its marketing partner. The usual workaround is to persist the TikTok click identifier and relevant cookie/session values before the domain transition, then restore them for the Purchase event using custom GTM/JavaScript.