Created attachment 189558 [details] document to check the problem - Open the attached document - go to the firstline - mouse right click - select 'insert' - select 'rows below' only on e row is inserted (should be better 'row below') and the font changes. if you do Ctrl-Z (undo) the new line is removed, but no way do undo the font change
Thank you for the report! This long-standing issue is already tracked in bug 126008, so I am marking as a duplicate. *** This bug has been marked as a duplicate of bug 126008 ***