> The ridiculousness of this defence makes it clear leadership was in the know.

https://kolejowyportal.pl/koleje-dolnoslaskie-odpowiadaja-ne... - this is from 2022-07-06. The train owner complains that they still didn't receive information from Newagg about what was fixed when unit had to be shipped to manufacturer after it refused to start.

So the issues with 3rd party servicing were publicly known well before the smoking gun was found in firmware.