Problem of Hide/Show function, plz help!

When i click on the button for the first time once the block loads it’s not smooth, it instantly makes changes. However all subsequent clicks result in the correct behaviour, for both “first click” and “second click” interactions.

the botton ‘contact’ in Mobile landscape 767px or down is the botton i mention.
plz help me!

here’s my link : Webflow - DancingAstro's Homepage