Reset docxListState if header has list information.

See #10258.

src/Text/Pandoc/Readers/Docx.hs

@@ -691,6 +691,24 @@ bodyPartToBlocks (Paragraph pPr parparts)
     let addNum = if hasNumbering && isNothing (numbered pPr)
                  then (++ ["unnumbered"])
                  else id
+    case numbered pPr of
+      Nothing -> pure ()
+      Just Number{ numberNumId = numId
+                 , numberLvl = lvl
+                 , numberLvlInfo = levelInfo } -> do
+        -- We check whether this current numId has previously been used,
+        -- since Docx expects us to pick up where we left off.
+        listState <- gets docxListState
+        let startFromState = M.lookup (numId, lvl) listState
+            Level _ _ _ startFromLevelInfo = levelInfo
+            start = case startFromState of
+              Just x -> x + 1
+              Nothing -> fromMaybe 1 startFromLevelInfo
+        modify $ \st -> st{ docxListState =
+          -- expire all the continuation data for lists of level > this one:
+          -- a new level 1 list item resets continuation for level 2+
+          let notExpired (_, lvl') _ = lvl' <= lvl
+          in M.insert (numId, lvl) start (M.filterWithKey notExpired listState) }
     makeHeaderAnchor $
       headerWith ("", addNum classes, []) n ils
   | Just Number{ numberNumId = numId