Are my internal NVMe drives causing PT to crash when recording multiple tracks?

[loud neighbor]

Looking for some wisdom regarding recording multiple tracks to internal PCIe M.2 NVMe drives.

The problem:

Quite consistently I have an issue where PT freezes in the middle of recording say 12-16 tracks at a time. It doesn't stop and give an error message - it simply hangs, frozen in time - tracks still red, etc. I can force-quit PT but have to restart my computer to re-open PT otherwise it hangs at launch. I also cannot simply hit "restart" from the Finder, I have to hold down the power button and do a forced restart because something hangs at shut-down as well.

The equipment:

16-core Mac Pro 7,1 (cheese grater) with 224GB RAM, PCIe M.2 NVMe drives for recording (4TB) and VI libraries (8TB) running PT 2020.5 on Catalina 10.15.3. The NVMe drives are set up for RAID 0. According to SoftRAID monitor all is well with the drives. RAM and NVMe drives are from OWC so I would hope there's not a quality issue there.

I never have this problem overdubbing 1 or 2 tracks at a time. Buffer size is usually 256. Maybe PT and M.2 NVMe drives aren't playing nicely together? Is there anything to this theory? I mean, have you ever tried to run full speed down a hill? Maybe these drives are too fast for their own good?

Any help is welcome - I am new to NVMe drives.