When dealing with the US its very prudent to always assume malice.
We will see if its malice by long how it takes for the issue to be resolved. If you see it dragging for a long time, you have your answer
engine issues with new aircraft is very common. the superjet issues are not simple. Please don't trivialize it with statements like
"When dealing with the US its very prudent to always assume malice."
when you don't know what happened there