I second this. Same problem here.
To give you some data:
XPS 15-9550 Notebook. 1 TB HDD /dev/sda as data HDD, to be disregarded for linux.
128 GB Samsung NVMe SSD SM951
Installation via USB Stick in UEFI mode; booting from the stick worked flawlessly (tho my USB tethering is causing the system to ang quite often; after this happened, you need to hardreset.) Created /boot and / partitions (FAT and ext4 respectively) on the SSD, systemd-boot as bootmanager. After reboot, some linux info pops up, sometimes not and it’s a black screen with a blinking cursor…