Mini7 based on experience if your data log shows identical boost requested & boost actual that’s good, but also verify the WG duty cycle isn’t maxed out to achieve that.
Another probability is a bad injector. If one is bad (dumping fuel) the other three will over compensate resulting in a dangerous condition where one hole is flooded & three are lean. Easy way to test this theory is pull the plugs for inspection right after that 3-4th gear data log with minimum idle time afterwards.
Or vise versa, could have one cylinder lean and three rich.