Oil and coolant are mixing through the turbo charger, what could have caused this?

What is your question?

The car has always had a bit of a "hiccup". Recall on fuel cap flange performed as well as software update. The hiccup (hesitation) did improve, however, lately it is happening more frequently. Usually happens when accelerating and going up incline. Also, a quart of oil has to be added about once a month. Car has 80,000 miles.

What makes this problem better or worse?

Cold and when it has been running a while

How long has your 2012 Audi Q5 had this problem?

Always, more frequent now