CommerceKickstart; Slideshow content/pages disappear if I add a Product Reference field under Slideshow Content Type
if you want an slideshow that will display products you may want to create an slideshow that will display "product displays" and add to it an relationship with the products entity, then grab from there stuff like "add to cart" button, images, prices etc.

fields in the view may be in form of :  


[product_display] - title 
[product_ref] - price
[product_ref] - img 
[product_ref] - commerce line item "add to cart"