I just received a replacement platinum from Amazon. It is supposed to be new. After charging the control unit and drone batteries, upgrading the firmware, and performing the imu and compass calibrations when I turned on the DJI Go 4, control unit, and drone, I received the following warnings: FWD Vision sensor error System Warning Check APP. After turning everything off I uninstalled the DJI Go 4 and reinstalled it. I restarted everything and received the same messages. I downloaded and installed the DJI Assistant 2, I did the calibration routine, and the warnings are gone with a successful test flight. My question is: Is this normal to require the calibration? the first Platinum I received did not require this and flew perfectly. The reason for return was shipping damage to the micro usb door, it fell off and was lost. I noticed when unpacking the replacement some of the protection sensor covers were missing and am concerned I received a refurbished not new drone. should I be concerned?