[safari] cc-zone: skeleton animation persists after disabling skeleton

[florian-sanders-cc]

Context

With Safari, the cc-zone component skeleton animation remains visible even when the component is no longer in skeleton.

There is no issue with the loaded story of the component, it only happens if you go from skeleton to loaded so it is easy to reproduce by looking at the cc-addon-linked-apps - simulations story

Gg @Galimede for finding the issue!