i took a quick look and this might be caused by too much wgdc adder....
seems like the car is still adding boost by pid cause you havent reached your load target yet but a second or so later it realizes it added too much so throttle closure happens
What puzzles me is the fact that the same tune worked fine before. I also have never seen WGDC being added while throttle is being closed.
I also have a log where WGDC After PID is above Base for 4 seconds while oberboosting with throttle closure. Dosn't seem to be a delayed adjustment.
Hope roads are dry enough tomorrow for a pull during commute to work... temperature is back at the level they were when the tune worked fine.