Yeah this really stands out to me too. I'm still just a PhD student, and my PI is fairly hands-off (in that he tells me roughly what problems need addressing an

Yeah this really stands out to me too. I'm still just a PhD student, and my PI is fairly hands-off (in that he tells me roughly what problems need addressing and their priorities and trusts me to work autonomously), but as a result he's also hands-off with taking credit. He doesn't present my work in detail on his own, typically he tries to have me present to do that myself. It'd be pretty fair for this person to be held partly responsible if he was presenting it at conferences, which outside of exceptional circumstances (eg the postdoc was supposed to present but had to cancel with very short notice), would justify the assumption that he was familiar enough with the work to speak on it.