Had a crash today
Mac OS X Sierra - Mac Pro 5,1 12-Core 3.33 GHz, 20GB Ram, SSD system drive & audio drive
In an audio multitrack session, without any plugins, added a Kontakt and Komplete Kontrol Track to add several MIDI recording options.
(Cubase, Native Instruments all latest builds)
Turned out Kontakt was enough.
Removing the Native Instruments Komplete Kontrol Track crashed Cubase,