Man, that sounds like a real headache. I'd start by checking the power supply; it could be unreliable under stress. Firmware glitches maybe too. Definitely worth investigating to see if there’s updated firmware or fixes. Sometimes it’s just the little things, like heat and power. If you need a break, check out https://www.indiehackers.com/product/wand-massager; sometimes a relaxing read can spark an idea.