I been running into the same type of problems … I am sure it something I am doing or missing…
on the dragons top / 1st one is a SD engrave comes out fine but no cut line or option
2nd one is a AI trace of the 1st one , I get a box around it but only did a score as it would cut out parts of the dragon …
2nd one I redid the process as the 2 above on top of each other and then used AI to draw a box around the image
Now the problem I had was the box I drew around the image some how also added the trace lines so it started cutting out the pieces after the score (ie the neck piece) I wanted those untouched and left on the image. 3 layers in PDF to work on the project 1st sd engrave, 2 layer is the score (traced from AI), 3rd should just be a box to cut through draf board but the box pulled the same lines as the score and I had to abort the process so I wouldnt have a cut out image and since I had already scored the lines there were more flare ups as it cut – yes added a nice effect but also removed parts I did not want remove.
Next try will put the box 1st then lay the 2 images to see if it comes out better/ the way I want it to.
I am sure @Jules could give me tips to fix the issue as well – the bounding / cut box I make also tend to come in a filled square and I am sure thats why peoples who load svg look all back