Hi @marc_uk, thanks for reaching out here on the forum 
To be able to better help provide some guidance, If you could share the read-only link to your site, we can see how it is currently styled and how the interaction is setup.
Can you also give the page name and class names of the elements you are using in the show/hide that is not animating smoothly?
More information about read-only links:
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Cheers, Dave