Help! Code blocks creating massive space on website!

Good morning! I embed code from Shopify on my Squarespace website and, especially since the Fluid Engine switch, some massive spaces have been created around the code blocks that I cannot adjust, no matter how hard I try! 

For example, see the last two tours listed here with the Shopify buy button embedded SarahsWalkingClub.com/kayak. 

And, it's even worse on one page on my site that is behind a paywall!  

I've looked through the forums and tried some custom code like .sqs-block.code-block.sqs-block-code {
  padding: 0;
}

.. but nothing has worked! I would greatly appreciate some guidance. Thank you so much! 🙏

share sacreenshot which one section?

Thank you so much, Paul! That was the solution!!