Good afternoon Stephen and welcome back!
Thank you for reaching out to us.
We are sorry to hear about that surprising layout on your list view. Yikes!
I would love to help you with this topic.
I believe what is going on is that your list view is displaying an unfiltered version of your “Event description”, including images.
I believe that the solution will be to use manual excerpts for events that do not have much text.
You can read the following article about that topic: https://theeventscalendar.com/the-trouble-with-excerpts/

Let me know if that helps.
Have a great day!
Geoff B.