Nav stutter when scrolling in blog page

Hey there, I’m having an issue where my navbar stutters when scrolling through my blog page. I’ve tried removing some elements but that doesn’t seem to fix it. The issue appears only on mobile and only on my blog page - other pages work fine. I’m using an iPhone Pro Max 12 for this.

LINK to live site with blog post example: Всяка стъпка до прием в детски ясли и градини — кандидатствай

Here is my site Read-Only: Webflow - kandidatstvai