I think the orange fence may be too wide for them to grab hold of.
BUT I may be wrong.
The tendrils on the vines move around in a circular motion until they hit something then they grab it and coil up.
Here is a bean doing the same thing.
https://youtu.be/dTljaIVseTc
Cucumber fantastic.
https://youtu.be/Vbzgv5iKEyY