python-docx: Sections with numbered lists as content

I'm trying to create a SOP Word doc out of a JSON with the following structure:

{
  "doc_id": "hydraulic-press",
  "title": "Hydraulic Press",
  "description": "Procedures for safe startup, operation, shutdown, and basic operator maintenance of the Hydraulic Press 3500.",
  "sections": [

    {
      "section": "Know the Machine",
      "steps": [
        {
          "description": "Identify the main components: main power switch, control panel, cycle start, cycle timer, pedal, temperature gauge, ram sensors and indicator lights, emergency stop (red button), crank handle/adjust mechanism, alignment plate, front tilt control, and output tray.",
          "images": []
        },...

And so forth. This is my helper function to build the word doc:

def build_doc(sop_json):
    doc = Document()

    # Title
    if sop_json.get("title"):
        doc.add_heading(sop_json["title"], level=0)

    # Description
    if sop_json.get("description"):
        doc.add_paragraph(sop_json["description"])

    # Sections
    sections = sop_json.get("sections", [])
    for section in sections:
        section_title = section.get("section", "Untitled Section")
        doc.add_heading(section_title, level=1)
        steps = section.get("steps", [])
        for step in steps:
            para = doc.add_paragraph(step.get("description", ""), style="List Number")
            for image_ref in step.get("images", []):
                add_image_to_paragraph(para, image_ref)

    return doc

It's almost perfect, except for the fact that the numbers for each step do not restart with each new section. So, for example, I have this:

Know the Machine

1. Identify the main components: main power switch, control panel, cycle start, cycle timer, pedal, temperature gauge, ram sensors and indicator lights, emergency stop (red button), crank handle/adjust mechanism, alignment plate, front tilt control, and output tray.

2. Note sensor behavior: sensors on the ram sometimes glitch; confirm their status by checking the indicator lights before and during operation.

Start Up

4. Power sequence: turn on the main switch, then the panel, then initiate cycle start at the panel.

5. Pre-start check: check oil levels before starting; LOW oil levels indicate problems and must be addressed prior to operation.

How do I get it to restart the numbering index with each section?