There is no single cause. Most guides tell you to "reinstall drivers," but that is only 20% of the solution. Here are the four primary factors:
For Windows 10/11 Pro:
Windows power management has a feature called "USB Selective Suspend." It shuts down inactive USB ports to save power. The Miracle Box software constantly polls the dongle, but Windows may interpret this as idle behavior and cut power momentarily. unstable usb port miracle box 282 solution
Power stability check
Retry queue for flashing
Hardware mod suggestion
Follow this protocol in order. Do not skip steps. There is no single cause