Oh wow, you described exactly what I was experiencing with another bug. Looks like they are related. Bad Rytm Scale/Master LEN bug…
Here’s the response I got on that:
I’ve ran into this issue as well a few times. I reported it to the devs a while back, but haven’t heard much about it.
They might have fixed it since it hasn’t happened in the latest internal beta (and I always use ADV Scale mode) - but I don’t know for sure. I’ll ask around.
However, to get around Master Length not saving properly, try putting a Trig somewhere on the Pattern and then remove it, usually that would fix it for me when it wouldn’t save properly.