Because Kontakt is a clunky, buggy minefield.
I've just used Bassynth for the first time since buying it the other day, and created a huge bass sound for this track I'm working on. Automated a few parameters (drive etc) for movement. Sounds great - super happy. I closed the session and went out for dinner. Just come back and now and Bassynth goes "NOPE".
I should have saved my own preset Sigh.
I still stand by my statement that I wish they'd get Bassynth out of Kontakt. I might have to just abandon it right now to save further heartbreak, heh.