No, I've never heard of anyone getting good memories.

[ That might have been nice although confusing. Istredd is still overwhelmed by what happened, and tired, and sad, and he's been in an unsteady situation because of Lucifer's instability. It's been a very bad time for the two of them but they're trying their best. ]

Yes, same night. Apparently Geralt did too.

[ He doesn't know if she knows Geralt or the others from their sphere. Istredd didn't ask about Jaskier or Ciri, but he assumes they probably did. Or they would, eventually, if the three of them had it happen. There seems to be a pattern of some kind, or maybe it's more of a wave. ]

He was there, but ... Thanedd, the Brotherhood, that's our people who died.

[ It's one of those times when he and Yennefer are a unit that other people can't actually touch, no matter who they are. Because they grew up in the same place, with the same people, and the same trauma. So they ran to each other as soon as they could and shared in the grief it all brought. ]

I was captured by the mage who betrayed all of us, he wants to use my knowledge for his own gain. Yenna thought I was dead.