I have experience in laser plotters. Design a small editor to laser engrave Iphoe housings. It is made in javascript and works in the browser.
I have not used that software, but I suppose it is the error of how the text deals with the editing program. It is often difficult to distinguish what it is like, starting from the fact that it does not locate the source, or because it uses absolute measures, and not measures of font size.
So the solution is to turn it into a vector first. That is, the text must be a "path", which can then be converted to the plotter format, which is usually "dxf".