apols for delay,I did a bit more testing, installing on dell xps 8930 with the internal nvme in RAID mode, (ISO on USB pen drive → install to external nvme) worked fine, but the dell XPS 9300 laptop with the same RAID options and drives has this black screen after grub issue both on the nov and dec ISOs.
I’ll mess around with some UEFI settings to see if there is something there that is causing it to freeze, the problem device, xps 9300 has thunderbolt 3 which the working device xps 8930 does not, so worth checking out if TB makes a difference