Why is the sticky header with transition point not working anymore?

Hi new to Wix here! Just recently been exploring the capabilities of Velo, I was simply following the tutorial about making the strip on header visible only upon leaving a specific strip viewport when scrolling.

Here’s the tutorial from 2021 btw: https://youtu.be/9_jtI06mqwk?si=eNnwbMOuY7OuBkE-

I carefully followed each steps but for some reason it still wouldnt work as expected.

Can someone enlighten on why that is? Thank you very much!

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