Strange Things Happening With Nav Component

Am I the only one seeing this behavior? The prebuilt nav component seems to be broken, it works fine until published, then the top two links do not display immediately when in mobile landscape or mobile, they just pop in sort of at the end of the animation.

Seems to be with chrome and chromium based browsers, fine in firefox

Here is my site Read-Only: [LINK]1
(how to share your site Read-Only link)

Hi! Your read-only link doesn’t work.

Sorry, fixed that, I just noticed now while building this test, that it only started to happen after adding the prebuilt cards layout. Removing it goes back to normal.