Concurrent tracking events during new visit cause extra visits

We are using the http tracking api to send tracking events directly to piwik. For a first visit we often generate multiple simultaneous events (timestamp for these events are the same or within 4 second range).

We observe that this can create extra visits. See screenshot showing the same visitor generating two visits

Is this a limitation of piwik to handle concurrent first visit events or would this indicate a misconfiguration of our system?

This edge case is normally solved by using our plugin here: