Hi Michael!
Thanks for getting in touch with us. Let me help you with this topic.
I can see this behaviour for your site, but I can’t reproduce it in my own local installation.
This issue could be related to a theme or plugin conflict, so to narrow the problem down please go through the steps provided in the testing for conflicts guide > https://theeventscalendar.com/knowledgebase/testing-for-conflicts/ and let us know what you find in the process.
We always suggest to setup a dev/staging site so you can test things out without disrupting the live site.
Let us know how that goes and if you have questions in the process.
Thanks,
Victor