Drobo 5D Random Shutoffs?

It doesn’t happen a lot, I think 2 or 3 times now but when I go to access my LR Catalog, LR complains it cannot find it.

I look and sure enough, the mounted drive is missing. I peek over at my Drobo 5D and it’s off. No LEDs nothing. I have to turn it back on via the power switch.

It’s connected to a Windows10 machine via USB3. The windows machine does not go to sleep or put peripherals to sleep.

Anything I can look at specifically to figure out why this might be happening?