Howdy Andres,
I would love to help you with this.
It looks like your theme is set to show excerpts rather than a post’s full text. When you have it set to show excerpts WordPress will strip formatting from the post.
If you go to WP-Admin > Settings > Reading you can alter the setting from “Summary” to “Full Text”. Does this do the trick?
If not, could you try changing templates in WP-Admin > Events > Settings > Display . You will notice a few templates available in the dropdown menu, try each one, hit save. Does one of these behave how you wanted?
If all else fails you might reach out to Divi. Ultimately the theme can override any setting if it wants to. So if your theme is setting things to be summary/excerpts even when you have set it not to, the fine folks behind Divi should be able to help undo this.
Did one of those work?
Cheers!
– Brook