Arturia CZ V: why is it producing a (beautiful) drone when I follow these steps?

[jeremycsf]

1. Go to Presets > Brass & Winds > The CZ Brass.
2. Open the Envelopes tab.
3. Change Line 1/Line 2 Amp's envelope generation mode to MSEG.

Why does the synth produce a drone when I do this? I've gone through all of the envelope and modulation parameters and can't for the hell of me figure out why.

Any thoughts greatly appreciated...

[Zipede]

Hmm, add a new point after point 3, drone goes away, now delete that point and drone is still gone. Maybe I'm missing something, but it seems like a bug.

[jeremycsf]

That's what I found too, was hoping it wasn't a bug lol...