I updated PS CC 2017 to 2018 and copying slices content does not work in PS CC 2018.
Previously, when I created a slice, I could copy its contents and paste anywhere I wanted. (ctrl + c) Now it does not work ...
I create a new slice, select it and copy it by ctrl+c.
and this is a CTRL+V effect in New document:
It looks like it copied something from a completely different area of my source psd (propably selected layer). I've used slices for years and the first time I have such a problem.
I have the same problem, did you fix it?