Hi @bruno.tx ,
To rule out a bug related to the fact that your default images are configured for the DEV card and not for the Dahlia card, I have reconfigured the system as follows:
fw_setenv board 'dahlia-imx8mp'
fw_setenv board_name 'dahlia-imx8mp'
fw_setenv fdt_board 'dahlia'
fw_setenv fdtfile 'imx8mp-verdin-wifi-dahlia.dtb'
reboot
I have repeated the tests and the failure persists.
Best regards,
Julián