Related posts conflict

The AMP plugin is generally working well for me. However, I wish to disable Yuzo Related Posts in my AMP posts as it does not display well. The author of that plugin gave me code to add to his plugin’s custom CSS to do this .yuzo_related_post .yuzo_wraps{ overflow: hidden; } but it does not work. He tells me to seek help from you, saying: “Yuzo and AMP should work independently. Somehow the Yuzo css is not being printed inside AMP, you can request AMP support because yuzo normally prints its style correctly”.
You can see the issue here.
Please can you advise? Thank you!