That’s the best description of desktop laser hardware ever! 
Unfortunately, the combination of underdesigned electronics, a knockoff power supply, the cheapest possible USB cable, and buggy embedded firmware produces a machine that intermittently fails without warning.
Equally unfortunately, LightBurn must detect those failures at the far end of the USB connection, where it doesn’t get much information. I have only a general idea of the USB driver interface in Windows / Mac / Linux, but I’ve made the mistake of assuming a synchronous communication link would report a failure, rather than hanging up without notice and pinning my code to the mat.
LightBurn gets all the blame because it’s the visible user interface, but the real problems lie at the far end of the cable.