For a moment, Soundwave seems uncertain, looking down at his hands. He isn't interested in getting people into trouble, but if Vandal wants to know...

"Fortress Maximus. I ain't gonna hold it against him. I know other Soundwaves and Decepticons can be wicked fiends, but ... like I said, no one's reacted like that before."

It makes him curious, worried, and it hurt plenty, but it's not in him to bear a grudge for that reason.