Good evening Ben and welcome back!
Thank you for reaching out to us.
We are sorry to hear about the margins being gone on your site on single events. Yikes!
I would love to help you with this topic.
As a first troubleshooting step, could you please provide us with your complete system information in a private reply using the instructions found in the following link?
https://theeventscalendar.com/knowledgebase/sharing-sys-info/
Secondly, I believe that heading over to Events -> Settings -> Display and choosing Default Page template under Events Template will fix your issue.
Let me know how that goes.
Best regards,
Geoff B.