Nuendo 12 freezing/crashing on audio export

Very often Nuendo 12 completely freezes when I try to export my audio files. It creates an inital file with 0 bytes and does nothing, doesn’t react anymore and I have to close the application with the Task Manager (Windows 10). This is totally annoying! When I then start Nuendo again I sometimes get an error message that content files could not be validated online or something like that.

I really feel that Nuendo 12 is more or less still in its beta stage. This is the least stable version of any Steinberg Software I have ever experienced and I’ve been using Cubase since its first versions available…