Scale interaction inconsistent

I have a simple scale interaction on page scroll that is performing irregularly, sometimes it’s working fine, others not.

On the ‘About’ page, the interaction should make the envelope in the top left of the Nav bar scale to 0.6 on scroll down the page and back to 1 on scroll up.

The same effect with a different interaction is working fine on the Homepage as a comparison.

Anyone see what’s happening here?

Forgive the messy class labels, definitely needs a tidy up…!

Cheers,
Tristan


Here is my public share link: https://preview.webflow.com/preview/tailored-prints?utm_source=tailored-prints&preview=23181119f98b4fe5f722bb8673569386
(how to access public share link)