Poly sequencer won't work when stack mode in engaged.
I just upgraded in 1.1.4.9 and followed steps with calibration trying to solve the problem but it doesn't...
I don't think it's usual behaviour, don't you?
After more research in global mode, I found that turning ON Multi mode, allows poly seq in stack mode but when you try to shut it down, you have to push the button 2 times before it stops, really wierd...