[Zubersoft]

If the pause duration is 0 and you set it to "Scroll and Pause", then it's going to scroll 20% over and over without any pausing until it hits the end of the song. It's obviously exposing some kind of bug, but having a 0 second pause doesn't really make sense for that mode. What you are describing is better accomplished just using a pedal action to scroll 20% of the screen at a time with the speed set to "Immediate". You can use the "Scroll down or go to next page" pedal action for that.

Mike