Observed:
First, ‘ctrl+v’+selection always worked before for me. But this time, i got normal moving-mouse selection, instead of column selection. As in:

Why?
Reason of problem: as suggested by the comment from Peter van der Heijden , maybe I missed typed ‘v’ as ‘ctrl-v’.
Sorry that i can not accept your comment as the solution, because i can not do that for a comment.
You may have pressed
vinstead ofCTRL+V. I.e. You released theCTRLbutton before pressingv.