Issue with cutting white cardboard

I want to cut white cardboard ( 200g/m2) and have an issue, when I try to do it. All shapes are not completely cutted. That means : although the shape ( circle or anything else) is closed in my drawing, the laser always leaves a little bit , which is not cutted, about 1mm long. Why does this happen? It’s not the case, if I use a cardoard, which isn’t white. Any idea?

Perhaps this Troubleshooting doc will help:

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If what @ednisley mention not solve the problem…

Sometimes “tabs” are selected, and if you have selected 1 tab that could happen.

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