Two days ago I found this growing from my Hylotelephium spectabile Autumn Charm. I removed it and have planted it in it's own spot so I can keep an eye on it.
I don't know that it will survive as an all white plant?

Interesting. I have trouble with the variegated plants reverting to green you are getting white sports.

I thought that was very odd. It would be fun if it survives.
@JungleShadows
Kevin, can you give us some information on what causes this, and what it's chances are of surviving?