Unstable Port(COM)

When I connect the Pixhawk 2.4.8 to my computer (Windows 11), I can hear the computer see it and see the device. In devices manager, I can see it as a Legacy FMU (com5) for a few seconds , switches to ArduPilot(com6) and go on repeating this. When I try to connect to Mission Planner, it says that it cannot find the port or wait for the port. I think this is a driver problem or PC problem. Please help!

  1. replace the usb cable with a quality one
  2. Use direct USB port, not a hub
  3. Replace the flight controller with a real one instead of a cheap Chinese clone.

Thank you for your reply, but none of them worked well…