Ground fault trips upstream breaker instead of downstream even if they are coordinated?

[RonUH]

I believe I found the article I was referring to. It was dealing with 3-pole vs 4 pole generator ATS's. I would expect the issues with multiple N/G bonds should be similar. https://resources.kohler.com/power/kohler/industrial/pdf/3_Pole_ATS_White_Paper.pdf