Multiple visits logged when conflicting campaign URL parameters are used #18511
Labels
Bug
For errors / faults / flaws / inconsistencies etc.
c: Attribution
c: Data Integrity & Accuracy
c: Tracking
For issues related to getting tracking data into Matomo.
Milestone
If a URL containing campaign parameters with different values is tracked when the Referrers and MarketingCampaignsReporting plugins are both enabled then multiple visits will be logged for the same visitor.
For example:
https://exampledomain.org?utm_source=bing&utm_medium=sem&utm_campaign=&matchtype=b&utm_term=test1&utm_content=&utm_medium=ppc&utm_term=test2&utm_campaign=test3&utm_source=bing&urlref=https://se.search.yahoo.com/&_id=uuidabc123&_idn=1&_rcn=bing&_rck=test4&_refts=1638204380&_ref=https://se.search.yahoo.com/&send_image=%27
It looks like first
plugins\MarketingCampaignsReporting\Tracker\RequestProcessor()
choosestest3
as the campaign name and also sets it as the referrer name and the referrer type as a campaign.Then
plugins\Referrers\Columns\Campaign::shouldForceNewVisit() (via plugins\Referrers\Columns\Base::detectReferrerCampaignFromTrackerParams()
) uses the_rcn
URL parameter to detectbing
as the referrer type. Since the values don’t match a new visit is forced.This is more obvious when there are media elements on the page sending multiple media tracking requests, where 4+ new records are created in the
log_visit
table for the sameidvisitor
withing a few seconds.See L3-187
Expected Behavior
Only one visit should be recorded.
Current Behavior
Multiple visits are recorded.
Possible Solution
MarketingCampaignsReporting and the Referrers plugin should prioritize the campaign / referrer URL parameters in the same way so that the referrer is seen as the same and no new visit is forced.
Steps to Reproduce (for Bugs)
https://exampledomain.org?utm_source=bing&utm_medium=sem&utm_campaign=&matchtype=b&utm_term=test1&utm_content=&utm_medium=ppc&utm_term=test2&utm_campaign=test3&utm_source=bing&urlref=https://se.search.yahoo.com/&_id=uuidabc123&_idn=1&_rcn=bing&_rck=test4&_refts=1638204380&_ref=https://se.search.yahoo.com/&send_image=%27
(optionally for more duplicate visits: Enable the MediaAnalytics plugin, add the MediaAnalytics tracking code, then visit a tracked page using the above URL parameters where the tracked page has a few autoplaying videos)
Context
Your Environment
Referrers
MarketingCampaignsReporting
MediaAnalytics
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