I think I have the same issue. Mac High Sierra.
Audio export was stuck, so I aborted it. The VST Audio Engine appeared frozen in Activity monitor. I therefore asked Dorico to quit. Spinning balls. I force-quit VST Audio Engine. Dorico still frozen, and I took a sample of it.
I then tried to quit Vienna Ensemble Pro 7, but it was stuck on"Disconnecting instance 4…". It didn’t appear to have crashed, but behave that way.
Paolo
crash-after-failed-audio-export.zip (20.2 KB)