Hey Vander,
Thank you for reaching out to us!
A few weeks ago we released a Hotfix (The Events Calendar 4.5.12.3) to solve this issue related to the display of events in the default Month View calendar.
This problem was introduced with WordPress version 4.8.2 and impacts all previous versions of The Events Calendar.
To solve this problem, I would recommend you to update as soon as possible. Please don’t forget to clear your site and your browser cache after the update.
We apologize for any inconvenience this may have caused.
Let me know if you have any other questions and I’ll be happy to assist!
Best Regards,
Patricia