MemTest86 7.3 UEFI resets after "Testing Multiprocessor Support"

[lunadesign]

Every time I boot in UEFI mode, the system automatically resets itself right after I see "Testing Multiprocessor Support".

I'm attaching the MemTest86.log file here.

FWIW, the v4.3.7 legacy version seems to work fine.

Any ideas?