Pixhawk2 USB issues and recommendations for quadrotor

Hi all.

  1. We use Pixhawk2 (Cube Black) and we have multiple issues on the usb interface the usb attributes isn’t consistent, e.g:
  • Some times there is a serial number (iSerial), sometimes no
  • Some times the manafacturer is 3D Robotics, sometimes its ProfiCNC
  • The product name is sometimes PX4 FMU v2.x

Some issues on with IMU’s… on some pixhawks
We buy Pixhawks from local retailers
Is there and what is the recommended hardware for PX4 (stable v1.10.1)?
Is there an official manufacturer that is recommended by PX4?