Laser cutting in and out

My laser cutter just started turning off while cutting. It cuts parts of a shape, turning on and off while cutting. If I rerun the shape, it stops cutting at exactly the same spots. I’m thinking it’s a software issue.
Suggestions.

What does the simulation preview show when you run it?

It shows cutting the whole shape.

Thanks for getting back to me. I finally decided that it was a loose connection since it was only happening in the first 10 inches of the y axis.

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