Strange problem with automatic tabs

In attached file when I use automatic tabs (with using option “skip inner shapes”), strange some inner lines also have tabs! How I repair
project so only out lines include automatic tabs?
Thank you

Problem.lbrn (1.2 MB)

Lightburn probably doesn’t recognise the ‘living hinge’ as an inner shape as it is made up of individual lines.
The easiest solution would be to ungroup the shape and put the outer perimeter on a separate layer

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