There is a problem with returning visits. They just don’t work. I checked and visits has the same config_id but visitors are not recognized as returning visitor but as a new visitor so in the effect we have visitors = uniqs and VisitsFrequency (Engagement) return 0 data.
I reverted class core/Tracker/Visit.php to this from 1.6 and it works perfectly.
No I don’t use javascript tracking. But even without it visits are tracked well but just returning visits are not. Can you tell me what was the brilliant idea behind that change ?