Small dashes showing up under text, not in preview

I have a Ortur Laser Master 2 Pro S2, model number LU2-4 SF.
I recently bought this, it engraves images perfectly but I’m getting some small dashes underneath some letters when I try to engrave fonts.
What would cause this.

Can you attach your .lbrn file? There may be something in the design causing this.

Also a photo of the artifact would be helpful.

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