Cant create any more numbered lists.

[rapid3642]

I have been working on a word document .docx (word 2013) and the document is 265 pages long and all of the content is individual numbered lists. As i create more and more numbered lists I ran into an issue many times now that i'm unable to create anymore numbered lists. When i click on restart at 1 the lists go blank with no numbering. and i have done a lot of stuff to try and work around it but I cant find anything that will fix it. Thanks in advance for anyone putting time in to help me.