@course-guide,
Checked the issue on your site but could not able to replicate the issue.
refer:
https://screencast-o-matic.com/watch/cqfqbmZtOS
Steps I followed:
Logged in as admin and then try to create a new course and also try to edit the existing course. Let me know if I am replicating it wrong.
In your recordings the styling is all messed up. This could be only possible when someone is using the blank child theme for modifications and the style.css of the parent theme is not imported in child theme. At that time, the styling of parent theme not applied. But in your case you are not using b lank child theme and everything seem to be fine.
It's better if you can share the steps to replicate the issue, then we can guide you better