I have a layer set up with a VST and pad sound. I am mapping CC64 Sustain to CC66 Sostenuto.
If I play a chord with the sustain pedal held (mapped to Sostenuto) and then mute the layer, the next time I unmute the layer the same chord will resume playing at the volume heard at the time it was muted.
There can be a delay of several minutes, I can play a whole song with other layers and the pad layer muted, but the moment I unmute that pad, I will hear the original chord again until I depress the pedal and raise it. The layer is missing the note off messages.
This used to be a bug with the sustain pedal but that was fixed a while ago. This new bug only appears when I have the Sustain cc 64 mapped to Sostenuto cc 66.
It also only appears on some VST instruments. The bug is not there on Halian Sonic but is there on Roland Zenology VST. I don’t have any other plugins that support Sostenuto to test on.