Ack, dude you need more fat!!
While in Ketosis your body needs a 50/50 fat/protein macro breakdown.
Right now your basically burning protein for fuel and not using it to recover from workouts and MAINTAIN the current muscle.
During Ketosis 70% of the brains energy is provided by Ketones, but the other 30% is formed via Gluconeogenesis.
If your body is use to burning some protein for energy while you sleep, your body will continue to burn your muscles instead. You need lots of fat in a keto diet.
I'm pretty good with my keto diets now, I've done a couple in the past. What are you doing for carb up days?
You don't want to crash your thyroid with that low of calories.
That looks like it's only about 1300cals.
"The most merciful thing in the world, I think, is the inability of the human mind to correlate all its contents... some day the piecing together of dissociated knowledge will open up such terrifying vistas of reality, and of our frightful position therein, that we shall either go mad from the revelation or flee from the light into the peace and safety of a new Dark Age."
-H.P. Lovecraft