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
Questions:
Is there and what is the recommended hardware for PX4 (stable v1.10.1)?
Is there an official manufacturer that is recommended by PX4?