Hi, thanks for sharing this issue.
I've just thrown together a quick test on this side (.NET 4.5, VS2013), and the code coverage was still showing correctly. I suspect there may be more going on here.
Are you able to reproduce this issue in a simple throw-away solution? If so, would you mind submitting it via the contact form?
https://www.ncrunch.net/Support/Contact.
Thanks!
Remco