I have an existing old document (ca 25 years) which I keep updating. It has a number of chapters and within these are various numbered paragraph lists of instructions. In recent upgrades, these automatic lists have corrupted to 0.0.0. I cannot find any way to recreate the numbered list, except deleting all the paragraph codes then manually typing 1.<tab> , 2.<tab> etc. for all the lists in this large document. Somewhere there must be a code which has been upset by an upgrade and gone rogue . My current version is 18.104.22.168
Any suggestions what and where it might be?