Wow. I feel silly.
Our event page that I was troubleshooting had a widget that wasn’t showing up properly. (parts of a calendar, the grey spinning wheel, etc.). Tested all plugins, themes, etc. Upon further investigation, I found the actual calendar page was working fine but couldn’t figure out why the other page wasn’t. I discovered the widget was from the previous version of Event Calendar (a mini calendar option), swapped out the widget for the shortcode and everything is working as it should, with the Beaver Builder plugin activated, as well.
Thank you so for your assistance!