This is what i see. (Video) It looks like the logo gets covered by elements before it actually fades. Check your shadow/bg colors on mobile landscape and above for the divs containing the word “fact”. Another solution: Can you give it a little longer of a “ramp”? A little more distance to scroll before fading out whilr still providing interactivity?
My iphone 6 is 375 x 667 px for reference,Also.
Something is less than 375 before I scroll up, and gets wider (than 375… closer to 400px) or moves to the right after i scroll.
Possibly related… In the lower corner i usually see a webflow icon or nothing, but your site has a fixed element there. Thought the extra device testing would help.