I'm getting this very nasty problem only very occasionally, but a real problem it nevertheless is.
I'm automating VE Pro disabled tracks from Cubase. AFAIK, this is only happening on Kontakt instances where there are also additional Kontakt outputs. I disable / enable the whole channel with Kontakt inserted. When it happens, its a full deflection e to e electronic howl round. Pretty terrifying. I'm not 100% sure, but there's often a VE Pro crash afterwards, perhaps after another 5 or 6 operations.
There's no conistency - the next time I try it, its all normal. It's not specific to any one particular instance.
Win 10 Pro 64 bit, 6.0.17226. Kontakt 5.8.2 / Kontakt Player 6.0.1.