http://bugs.winehq.org/show_bug.cgi?id=33975
--- Comment #2 from Mike Blumenkrantz michael.blumenkrantz@gmail.com --- It seems to be less severe than I remember but still present.
Possibly related to tickets like http://bugs.winehq.org/show_bug.cgi?id=34011
I would guess that the demo, if it has any battle sequences, should exhibit the issue.