Muscle Loss

Mentzerj

Hello all!
As an introduction/preface, I'm about 6 weeks into my training (doing 3x a week strength, 3x cardio), measuring progress with body fat, weight, measurements, etc every two weeks, and generally try to keep my eating around a 1000 calorie deficit daily.
Today, in my progress check was the first time I've actually posted a loss on my lean body mass - wondering what other folks thoughts on this are? When you were losing did you over worry about muscle loss or just focus more on the loss and figure can put back on muscle later if need be?

Thanks!