We have tested your source VSDM drawing with the latest version 17.7 of Aspose.Diagram for .NET API and managed to replicate the issues as below:
This is the output SVG: Services Bid_17.7.zip (5.1 KB)
DIAGRAMNET-51329: VSDM to SVG - the line breaks are not preserved
DIAGRAMNET-51330: VSDM to SVG - an additional watermark text is added
We have linked your post to these tickets and will keep you informed regarding any available updates. We are sorry for the inconvenience caused.