Yes, unfortunately (at least here)
add Monotrack > record audio > insert Melodyne > record (transfer) in Melodyne > stop > save > export / import audio > save again > remove Melodyne from the insert slot > Cubase 8 crash (Cubase quits unexpectedly … blabla … )
Same happened on Cubase 7.5.3, but not on 6.5 (which was Melodyne friendly)
In Cubase 8 i deleted the preferences folder, restarted and opened a Cubase audio template - but didn’t help much. Still crashing …
Using the latest Melodyne editor version, Cubase 8 on OSX Mavericks
Hoping for a fix soon !