tamsinmalone,
Thanks for getting in touch! Hopefully I can help you out here, but can you help me understand a bit more? Are you referring to events not displaying in the back-end dashboard, or events not displaying for visitors on the site (or both)?
As a first step for troubleshooting, can you try deactivating all other plugins to see if that resolves the issue? If so, then try reactivating them one-by-one to determine if another plugin is the culprit. Give that a try and let me know what you discover.
Thanks! ๐
-Casey-