I'm using my Minibrute 2 with the Ardour DAW, I record tracks in midi and play them back to the Minibrute 2. It works well for some time.
Then, after a while, the Minibrute starts to play extra note, like a key is stuck: it plays my midi notes (or what I play on the keyboard), but when there is nothing to play, then it plays a note, always the same (but it can be an other one in a new working session). If I click back in time in the DAW, the extra note stops.
But if I unplug the midi cables, if I play on the keyboard again, then the extra note plays again (so it's not the DAW which is sending data), it's like the midi put the Minibrute in some kind of unstable mode.