“Also, a lot of the stem nodes had sent down secondary roots to both anchor it, and to help keep it hydrated.”
I have that. I didn’t know to call them stem nodes but there are cream colored strands that came out near the soil and have burrowed into the soil which I think is what you are talking about. My vine grew up the plastic stand with the tendrils wrapping around it to support the plant. Then, when it got to the top, it’s now hanging down and I think if I sat out there at night, I could see it growing because it grows so much in one night.
That's them! I'm not certain, but I think they start as regular tendrils, and are able to adapt themselves into roots under the right conditions.