Cut dept not working

I have a 3D cross that I’m trying to cut. I have my two bits that are a 1/4" for roughing and an 1/8 bullnose for finishing but my problem is when I start the roughing bit no matter what dept I choose for the bit to cut it cuts to the stop dept of the project. Do anyone know what is going on? I have done 3D projects many times and have never had this problem.
cross with heart.stl (7.2 MB)

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