Older Miracle Box units (pre-2018) may have firmware bugs that cause USB enumeration loops.
Firmware issues can cause unstable USB port problems. To update your Miracle Box firmware: how to fix unstable usb port in miracle box
If your Miracle Box is based on a Prolific PL2303 chip, increasing the latency timer can stabilize data transfer. Older Miracle Box units (pre-2018) may have firmware