DS2 is 5yo and dx'd with ADHD, ASD (HF), DCD, sensory problems, and hypermobility. We've witnessed loads of odd behaviour from him, but lately it seems that when he is getting frustrated, we're seeing a lot of very loud bursts of garbled vocal noises - generally not words - or if they are words he is saying them so quickly that we cannot understand them. It's been occurring more frequently during this school year roughly, and mostly when he is frustrated, excited, overly happy, sad... mostly extreme emotions. I haven't noticed this occurring just when he is not "all over the place" .. perhaps because he IS always all over the place - physically and emotionally.
Anyone else's children do this? It's a bit baffling, tbh.