Here are the doc and the HTML documents.
Thanks for your inquiry. it would be great if you elaborate it in more details.
The numbering (in the list of the word document) disappeared in the HTML document.
Thanks for the additional information. While using latest Aspose.Words 11.0.0. I managed to reproduce this problem on my side. I have logged your issue into our bug tracking system. Your request has also been linked to the appropriate issue. Once we sort it out, we will let you know. Sorry for inconvenience.