I have an install where multiple stores are being used and some products are common across all stores.
The issue is with one of the store, the url
http://domain.lo/store2/checkout/cart/add?product=327&qty=1 doesn't add the product to cart but session message does show up on cart page saying product was successfully added. I tried to use a debugger but didn't find anything wrong in the execution flow, it works correctly as far as I can tell.
The product is definitely in stock and works fine on main & other stores. Even its product page loads fine directly but that doesn't load on store2, one in which I have the problem. So, I reindexed everything but still no luck.
Out of ideas how to troubleshoot it further. Any pointers?