I repotted it in June. I didn't have potting soil on hand but I either used some soil from a bag (not dedicated potting soil) or I may have picked some up from my community garden; I can't remember unfortunately.
It was fertilized a week before it started going more yellow, so I don't think more frequent fertilization is the issue. It may look a little yes yellow after some watering, since I did water it after being gone for a week.
2-3 weeks after I repotted it in June, the vines started dying back and gradually are becoming dead branches with the leaves falling off. That is the main concern...I don't know why the ends of the vines keep dying and then the whole branch begins to die. I did read it can happen with anthracnose.