It's a fair guess that Bruce knows. But Dick gets being so scared of something that you don't see anything other way but struggling through for fear of the worst. He'd faced it after Blockbuster, after all. Only to have Bruce give him a much needed verbal smack.

He's more gentle with Tim. Tim doesn't need the smack. He needs support, especially with the way that he's trying to cry but not cry. "It's okay, Tim. What's happened isn't irrevocably broken. We'll sort it out and get you through it, okay?"