Mine do that a lot, it won't hurt it. My last girl was adult and lived quite awhile. She just died last week. She was not mated or laid ooths, but she was adult for quite a few months with no problems.
I feed them untill they strike away or run from the food. Don't yo be the one who decides when she can eat. God made it so they know instinctually when to do what.
A member on this forum has spent 250.00 with you and you are not sending or answering his messages.
You need to give him his merchandise or refund his money.
Do not buy from EXO as he is not being honest. I will revise this when he does answer.
Now saying that, the best way to mate the budwing or any other mantis in my opinion is to give her something new to eat, be it super worm pupae or whatever and put the male right on her back. I have done this with 4 different females and one male over the last 2 weeks and it worked each time...