We've set up a Google Tag Manager trigger for successful signups. We've configured it like this:
Trigger type: Other - Custom Event
Event name: Successful Signup
This trigger fires on : Some Custom Events
Fire this trigger when an Event occurs and all of these conditions are true
Event equals successful_signup
When we inspect the page, it looks like the event is firing, but it's applying an additional condition that we didn't specify:
_event equals Successful Signup.
Why is this extra condition being applied?