Using the minimal theme. Followed all steps to add line item properties / customization, however it isn't populating at check out no matter what I seem to try. I have been at this for hours- tirelessly. Any insight and direction would be incredibly appreciated. I have my properties showing up on the product page perfectly, but they don't show up at check out once a customer makes their selection. PLEASE help. Is there an additional code or something I need to paste into the cart or product template? Thank you!!
Sounds like the theme is using 'Ajax cart', which does support line item properties but some themes don't include the additional code it needs. Check if the theme has different cart types and try them out. For example, the 'Drawer' option normally uses Ajax cart under the covers so avoid that.