Cannot see NVMe drives from Fusion Drive

Joined
Feb 21, 2018
macOS
10.14.6
Mobo
Z370 Aorus Gaming 7
CPU
Intel Core i7 8700K
GPU
Aorus RX570 4G
#1
I have recently created a Fusion Drive from a WD 2TB HDD and a Samsung 850 Evo 500GB and installed 10.13.4 on it. I have 2 NVMe drives, Samsung 960 Evos, one with 10.13.4 on it and Windows 8.1 on the other. When I start up Clover (4449) I see all the drives as you would expect, but if I boot into the Fusion Drive, I cannot see any other drive in Disk Utility except for the Fusion Drive. Is there a fix for such a scenario? I previously had Sierra on the Fusion Drive but figured I would upgrade to High Sierra so I could see the other drives. TIA.

Update: I ran the 2018-001 'security patch' on HS on the Fusion Drive and it fixed the problem, all the NVMe drives reappeared!
 
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