Root cause: Steinberg EventList defaults to maxSize=50 events. The STOP
all-notes-off sweep queues 128 note-offs per channel (16ch x 128 pitch),
so addEvent beyond 50 fails silently and the plugin never receives the
remaining note-offs — voices keep sustaining and the transport loops
forever until the bridge process is killed.
Fix: raise eventList.setMaxSize(4096) in loadPlugin. Also assign unique
noteIds per overlapping note-on (stack per pitch) so note-off releases
every voice at that pitch, and log addEvent result + channel in debug
output for verification.
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