Igor, this will happen with baby CPO's They are cannibalistic in nature and only the strongest of them will survive. You will need to keep them separate from your shrimps for now as they will eat anything they can find (including baby shrimps)
I have only two CPO babies left and they like in one of my shrimp tanks.
All the other died only by one in a first week. I don't see what was wrong there, but it was something wring for sure.
The second sad part of this store, that I just missed whole bunch of my second babies. I had pregnant CPO and it had babies hanging on her a week ago. It was no eggs neither babies yesterday.
Ok, let's wait more ...
Sorry to hear about your losses. CPO's are extremely hard to breed successfully, not as easy as the other crayfish.
You may have babies in your tank that the mother released!
I just found 2 juveniles in my 30 gallon....I had a female with eggs, then one day no eggs...thought she just dropped them...which she did in my tank and now these are the ones that have survived!
More than likely you will see a few of them in a couple of months, just don't disturb the tank...they will hide until they are big enough to fight off other predators, including their own siblings/parents.