Hi all.

Please help diagnose what could be wrong. Dont know if this is mechanical or SW related. About 4 weeks back I blew a boost pipe at 1.1bar and the car stalled.
After fixing the leak I started to notice that from a gentle take off my WDKDYN is pulling -9 degrees of timing. The cooler had a fair amount off oil as well. My turbo is leaking and did deposit a lot of oil in the cooler after the boost pipe blew out.

This weekend, I cleaned the cooler and installed new plugs (NGK Bkr7EIX) with a std gap. Today, I tested the car and found that the timing pulls on WDKDYN are still there but they are now intermittent instead.
I have also ordered a can of liqui moly fuel system cleaner to get the probable oil residue off the internal component and hope that will solve the problem.
Note there is no smoke on idle. Water levels are steady after a good few heat cycles.
Compression test came back perfect on all cylinders at 1150KPA

I have included a driving log but cant see anything obvious other than a very aggressive boost PID in instances where knock is recorded.

HAS Anyone experienced this and how did they solve it. TIA

Car is 4cyl, 2.0t big turbo.