Please help with My chayote

Hello, this is the first time I’ve planted chayote so I’d like to share my experience. I have a lot of questions and maybe you can help me figure them out.  
I planted chayote under a pacae tree (inga edulis) so it would grow and use the pacae as support. It worked, but after a few months the chayote vines that were growing on the pacae died, and new vines started growing from the ground.  
Is that normal? Is it normal for chayote vines to die? And for new vines to grow from the soil?

Another issue I had is that I never got it to fruit. The chayote would produce small flowers with tiny fruit, but the fruit never grew and then it would fall off. One thing I thought could be the problem is pollination. The strange thing is that my chayote is under a pacae tree that has had flowers and there were bees on those flowers. Plus, I have a beehive 4 meters from the chayote. What do you think about that? Do you think the problem could be pollination or maybe other causes?

In the photos you can see the chayote vines dying, as well as its fruits. And the new vines coming out of the ground._

Since the new growth looks healthy, I don't think it's disease. My suspicions would be some sort of chewing or boring critter. Lots of gourds get attacked by vine borers...when I lived in Arizona it was a constant battle to try to get them out of the squash and pumpkin plants before they did too much damage. Look at the stem close to ground level and see if you can spot anything obvious. They will often have a hole with lots of droppings (frass) coming out.

if it wasn't an insect, it may be snails or slugs, or something bigger like a rodent.