lapasoa
After installing Sonar 2017.06 update, using Melodyne tweaking produces a nightmare, expecially with record a new track and with copy and paste.
It does as it pleases and I have to rollback to Sonar 2017.05.
Can you give more details on your Melodyne workflow here . . . are you copy / pasting Melodyne clips ? . . . or are you copy / pasting audio blobs inside a Melodyne Region FX ?
Your post makes it sound like something that was working in a previous version stopped working the same way.
I've found Melodyne and Sonar don't always get along . . . just because you try to do something that should work, doesn't always mean it will always work between Melodyne and Sonar. I wish there was a published list of what simply won't work, then we won't waste time trying to do it.
Give us more details and we can help wake you from your nightmare ?