F405 Wing not connecting after Firmware update


I have a new F405 Wing board that I was trying to setup with Ardupilot. I have flashed the latest (version 3.9.9) stable FW “arduplane_with_bl.hex”. I used iNav to load the FW and the process ends successfully.

When I reboot the board I am not able to connect to it using the designated COM port. I have no devices connected to the board and I am powering the board with the USB cable.

The blue LED is flashing after the board powers up.

If I go back and re install iNav, then all works well and I can connect to the board without any issues.

Any help would be greatly appreciated.
Thank You!

Anyone aware of such an issue who can help?..