Hello, before I say anything else, this is only affecting one model that I know of, Dell Latitude 5300, but it is affecting all of the ones I had available to test.

With the latest version of Dell IAX, I made a series of bootable USB drives, these worked great on several systems, laptops and desktops alike, until I tried it on a 5300, it simply will not see it as a bootable device, but it does see it if I try to add a UEFI boot path (though it fails to add it even if I select the proper .efi file). As I did not make the initial round of drives on the 5300, I installed IAX on a 5300 and recreated a bootable drive. Still couldn't boot off of it on the 5300 and other systems could do so without issue.

I update the BIOS after resetting settings to default (and then of course making the appropriate changes like changing Fastboot to Thorough, etc.) and still had issues. I'm honestly scratching my head on this one.

Any help or feedback would be greatly appreciated