Page in small window size jumping for once but become fluent afterwards

Hi guys, I ran into this problem that only appear on small windows in published site, the title and first paragraph jumps upon scrolling the first time after refreshing and scrolls smoothly afterwards. I didn’t use vh units on this and troubleshot loading issue. The element in question is bound to a sticky div and the element itself is static. I’m not sure what’s happening. Please help!

Thanks.

https://park-at-your-own-risk.webflow.io/


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