Question regarding muscle loss

Quick summation: was about 245 a year and a half ago (I’m 6,4”, 42 years old), pretty athletic frame with a lot of fat on it. Started counting calories, macros, etc. I do the I body tests every 6 weeks or so (not perfect I know, at least it’s a consistent guide). My peak, in my opinion, was about 6-8 weeks ago, was 210ish, with 9.3 % BF. I went yesterday, I’m down to 202, but lost 5 lbs of muscle, and BF is up to 10.2%.

I’m in calorie deficit until 3:00 or so, eat a big supper, usually average day per week is 1500 calorie deficit. My macros average 30/30/40. I’m getting on avg 200 G protein a day. I keep sugar under 45 g a day. I exercise full body 5x a week doing 30 minutes of bike followed by an hour of weight lifting or body weight exercises for an hour (I alternate days, lift mon body weight tue etc). I feel like im going backwards now.

What’s the word guys? Not eating enough, working too hard? Help me out. Tyia.