Google Analytics 4 is improving the filtering of automatically collected events from web data streams to address a subproperty filtering issue.
Moving forward, all automatically collected ‘first_visit’ and ‘session_start’ events from web data streams will have the same event parameters as the first client-triggered event in a session.
This ensures consistent and predictable reporting by allowing these automatically collected events to be properly filtered in or out of a subproperty.
You don’t need to take any action to enable this improvement, as it will automatically fix the issue for future events.
