Start the project and listen to the Bossa Nova. Clicking the cat will ruin your experience. 1. When the project starts a clone is created. 2. When a clone is created, it enters a forever loop where it "play sound [Bossa Nova] until done". 3. When a clone is clicked, it creates a new clone, which does the same thing all clones do, see step 2. This will fail regardless of whether the clones are synchronized or not. My guess is there is a callback from the "play sound until done"-block, which all clones erroneously receive. All code by me (@kriblo).