I just noted this in my updated (from 4.2) 4.3 test-setup.
Using vim to edit a file, i was unable to copy&paste (using putty) from my Windows box.
A quick search offered this:
It seems to be a Debian Strech issue with the vim version, they ship.
Contrary to what they said at Stackexchange, it worked for me by setting the following in .vimrc:
set mouse-=a syntax on colorscheme industry
(I didn’t edit the default-file since it is not update-safe)
Hope this helps if somebody of you has the same problem.