Yeah, being told that you got killed by the one being in the universe that you hated wasn't exactly the best way to welcome a bot. Or anyone for that matter. Leaving such a thing unsaid would be best. If Jazz had had any idea about it, he probably would have wanted to hear it from Bumblebee anyway.
There was an excitement in his tone as he said, "Sweet. No more Megatron. How awesome is that?" And the Witwicky kid pulled it off. Major extra credit points for Sam. He had to remember to congratulate him about him if he was here. If Ratchet had been right about him and Mikaela, they might be a couple or something like that. Maybe.
"Human?" That wasn't normal. Giant robots didn't randomly turn human. It just didn't happen. At all. "Um...he's human? Like you? That's...really jacked up, not gonna lie." But maybe this way Jazz could brag about being taller than Bee and rub it in his face. "Hey, at least I can say I'm taller than him now."
That strange feeling overcame him again and he shook his head. "Mikaela, did Bee tell you how he felt before he turned human?" It just wouldn't go away. "Cause I feel like somethin' ain't workin' right. But all my parts are fine." Hopefully he wouldn't turn human too. At least, not yet.