First of all, I love Patroneo!! It is suuuuper useful in my workflow.
I have recently started using it and I have encountered an issue.
I have a pattern with a lot of visible notes since I am trying to write some extended chords. From a fresh start, if I create the pattern and write chords with low notes, everything works perfectly and Patreoneo does not crash.
However, if I load the same session, as soon as I click on the pattern name to select it, Patroneo crashes.
I have looked inside the save.patroneo.json file to see what was wrong and I have noticed that Patroneo crashes if the value of "pitch" of the "data" field is greater than 23.
The workaround I have found is to create two separate patterns, one for the left hand and one for the right hand, reducing the number of visible notes.
So the issue is not blocking for me, but it may bother other users.