APO issue? Cache needs to be purged every few days

Hi, Every few days, the BUY NOW button on my all-in-one course page, stops working and after I go into Cloudflare’s cache>configuration, change my browse cache TTL to 2 minutes, then purge everything, then it starts working again. If I forget to do it it gets stuck again. Why? I am losing students as they try my website and cannot buy my course.
https://humsaprenatals.com/courses/all-in-one-online-prenatal-classes/

The problem started after I got subscription for Cloudflare’s APO. My course is Learnpress, Eduma through Thimpress. Before the APO, my site was super slow, that’s why I got the APO. I just disabled the APO on Cloudflare. What next?

A post was merged into an existing topic: Cache needs to be purged every few days