Thanks!!
I think it was because I had changed the section padding to medium rather than large but the interaction start trigger seems to be set to the top of the component. Changing the padding made the interaction start really late.
It works fine now
Would be a nice plus to have documentation on how it works to be able to tweak it if needed. The documentation GSAP puts out & what I could find on YouTube wasn't great (especially for non-code-savvy people like me)