OPNsense on Watchguard XTM 5 Series / stalls sometimes

[digger]

I did an install by writing the serial image to an SSD with windows.
plugged in a empty SSD into the Watchguard, plugged in the SSD with the image on in the Watchguard.

removed the Flashcard ( not needed )

Booted from the SSD with the image on, and installed OPNsense onto the blanc SSD

shut down the watchguard, removed the SSD with the image and left the SSD with the installed OPNsense in the box.

All boots just fine !!

although it looks like the version 17.1 stalls and then comes alive, sometimes a reset is needed.
so not stable fpr production yet!