@ashley The widget actually uses an endpoint in the Discourse Event plugin that is meant to only return dates in the future.
After a fair bit of testing I managed to recreate the issue though. It only arises (in some instances) if your events in the Discourse Event plugin don’t have end date/times. Technically this is an issue with that plugin, however as that wouldn’t solve your issue I’ve added an additional date-based filter to the widget to ensure there’s only future events display.
Please update to the latest version.