ResMed AirSense 10 AutoSet CPAP Machine Randomly Shuts Off

This started a couple of months ago. My ResMed AirSense 10 AutoSet CPAP Machine will just randomly shut off about 1 time per week. There is no major leak. I'm usually at least partially awake and it just shuts off. I press the button and it immediately turns back on so I don't think the power brick has overheated or it's partially unplugged itself somehow. I usually just breath to turn it on when I go to bed and that doesn't seem to work to get it to turn back on. Any idea what is going on? It's about 3 years old. No messages for being over the max hours.