Anderton
One person reported needing to raise the buffer value with the 12 strings.
I tried this following your post Craig, and it solves the problem for me. I took the buffer size up as high as it would go (2048 samples per buffer on my steam-powered 828 mk II) and your 12-strings worked fine, albeit with some latency as you would expect. As soon as I went back to 192 samples, which I normally use, the crashing problem reoccurred.
FWIW, the Steinberger patches have worked without issue for me too.