Mine just did an active regen today.
I just picked up the truck a few days ago (used) and I got a message on the dash telling me DPF 8-% full, Active regen in progress.
I just ran the truck down the road and it counted down to 40% then said regen complete. No big deal.
I'm not sure on how many times you will see an active regen, but if the truck is always in passive regen going down the road from what I understand and if conditions are right and it does its thing you will never see an active regen.
I'm sure someone else could give a better answer then me on the issue.
Before I picked up my current truck a few days ago which is all stock my last one was deleted so I never had any regen issues.