That is strange.
In the first instance, when you view the list of events in the admin environment, can you look to the Filters & Columns meta box (right above the list) … hit Clear, navigate to a different page then return to the list. That might be sufficient to fix this.
Failing that, are there any differences in terms of plugins/theme (even if the version numbers are different) between dev and production?
Our standard troubleshooting steps could also be useful here:
- Deactivate all other plugins except for The Events Calendar/Events Calendar PRO
- Ensure they are up-to-date
- Switch to a default, unmodified theme
- Check and see if the events are now visible within the admin environment
Let us know how you get on, as it’s always possible there is a conflict with some other component.