I dug into the source code and I believe it's caused by this: ui-path-scroll .post__article{-webkit-transition:height 1s;transition:height 1s} They set a tran

I dug into the source code and I believe it's caused by this: ui-path-scroll .post__article{-webkit-transition:height 1s;transition:height 1s} They set a transition length in the css so your browser is just obeying the style sheet. Doubt there is any way to override this without a browser extension.