Yes my miners have been slowly losing hash rate until they shut down completely on CM. So I switched to ipominer, CINNI and they had problems with cinni servers and again my miners shutdown, but never switched to backup. So down all day. Ahhhhhhhhhhhhhhh.
So I switched back to CM and gridseeds shutdown again. Not sure what is going on?
I had a day when all my gridseeds shut down at once. I did "this and that" and they finally started up.
I left the house, came back. Again they all shut down.
Long story short, I finally concluded that plugging my phone into a port on the front of the computer that runs my mining software was what caused it.
Pardon me for not qualifying what "this and that" includes, nor detailing what mining software I am using and etc. I tied a knot in the cable that I was using to charge my phone so I would recognize it and never use it again (but I kept it in case I wanted to prove it was the culprit).
...I use a USB mapping utility called UsbTreeView, and on its diagram the port where my phone was plugged in, it showed a yellow "i" indicating a problem.
I am not suggesting that your telephone is causing your problem, but rather I am encouraging you to maybe look elsewhere besides the gridseeds and power supply, as I had to do.
A prime example of what we techie people hate. You try everything under the sun to get something working again, and it winds up being the thing that can't possibly have anything to do with it.
"I just got this great new lamp at the thrift store! Oddly every time I turn it on my computer BSOD's."