I was having an issue with Dubia breeding, and was frustrated I couldn't get a coach roach to breed.
I had a young and hungry leopard gecko that needed roach babies to eat. Since I had over 50 adults, I had to wait. Every day I would pull apart their habitat and look for new babies. I was actually disturbing them.
I bought some super worms, and checked on the roaches after 3-4 days and had tons of babies. It is interesting that even such a basic creature reacts to stress.