2011 BMW X6 xDrive35i 3.0L p0306 under load

The customer had replace his spark plugs and coils in an attempt to fix the issue. not luck, then the vehicle sat for 7 months. The vehicle arrived at our facility on a towing truck​.​the vehicle can hardly move. After a visual inspection I noticed a puddle of water in the area of coil and injector 5 and 6. I removed both coils for a visual inspection and noticed both coils were rusted, submerged in water. I clean out the water and replace both coils and spark plugs. The vehicle idle good but will feel an intermittent misfire. at idle, I then took it for a drive and noticed that the cel started flashing during a WOT. At this point I read the codes. As a quick swap I exchanged coil and plug from cylinder 6 to 5. The problem continue on 6. I scope the current for the coil and injector both on at idle looks good but the injector will get disable while WOT. at this point the Misfire becomes continuously. I restart the vehicle and all is normal again. Then i swap the injector from 6 to 5. the problem continues on cyl 6. I also conducted an in cylinder waveform unfortunately did not save it but I remember cranking 180 PSI, Running 75PSI. I will attach some scan data and some waveform any Help will be a step forward.

Let me know if any additional information is needed, new to the team I will learn as i move forward. Thank you