I believe it has to do with this…can’t remember if this was the cause:
Assuming you used the shared mod file…
If so 2 options, redo the NVMe mod ONLY according the guide or/and update the mcodes using the new UBU 1.80 b1
EDIT: On the original 2302 Asus bios file, not using the shared mod file.
Again, i can’t remember and im not sure that this is the issue/fix, good luck.
EDIT: So you don’t even try NVMe only to debug the issue to mcode related or mod related… great insight…