I confirm this problem.
In my case it appears on the computer with the latest Windows 10 with two screens. When you open a plug-in (for example, Waves) in one screen it works fine, but when you move plug-in to another screen the next time you open it plug-in becomes black and crashes Cubase. This actual for both Cubase Pro 10 and Cubase Pro 9. I always start Cubase as administrator.
There is no such problem on another my computer with Windows 7 and two monitors. But today Windows 10 must be installed on new computers and Cubase must run correctly. Please fix this bug!