CoursePress Courses Change To Out Of Stock In WooCommerce

Just like this person explains, my WooCommerce products for my courses are changing to Out of Stock.

I’ve done a video showing how a non-logged-in visitor goes directly to a WooCommerce product page (associated with CoursePress) then that product is set to out of stock for everyone immediately. This is really frustrating and keeps happening randomly on my site, prevent others from purchasing.