@JohnYang1997 My boyfriend bought one last week and I was testing it with my Aeon Flow closed-back cans, and I too noticed the clipping and cutting out.
It happens at less than halfway of the volume knob on high gain and happens at 75% volume knob on low gain. MrSpeakers (TCA) headphones have low impedances and the Archel2 Pro is rated for 16 ohms, but I've had cheap and poorly measuring stuff like the Micca OriGen G2 drive my headphones without problems, so this current limiting distortion is a really big design flaw.