So I have a question, did something happen at 12:59:32 UTC time on the 23'rd? For some reason, I dropped about 10TH and I noticed one of my S9's was only dishing out around 4TH. I finally noticed and rebooted this day and it looks like it is climbing back up. I did get an email saying my hash was low this morning, that's what gave me an inclination something was up.
See restart message from Kano here: https://bitcointalk.org/index.php?topic=789369.msg30936228#msg30936228Funny thing is I was aware of the restart and still started to scramble when I heard it cutoff since I still don't have a 3rd pool configured.
He first posted it early in the morning (my time) and it was on the top of every web page all day yesterday. He even had a cool count down timer in the message on the web site
https://bitcointalk.org/index.php?topic=789369.msg30897601#msg30897601