Symbol instances populated along text path if they are center aligned, do not keep their position after saving and reopening the document. Do as the following:1. Create a path and convert it to a text path.2. Create any shape and convert it to a symbol.3. Copy symbol instance to the clipboard, then paste it several times on a text path.4. Assign Center Alignment to this text path.5. Save and close this document.6. Reopen this document.7. Watch how your symbol instances on a text path got shifted.