So my product kept selling but i had the "keep selling when out of stock" enabled.
I have these items sold placed in two locations, in the US and EU, and they are exclusive to each other. Meaning EU customers cannot place order for US location items with an EU address and the same way around.
The item had stock in my EU location, but my US location customer was able to add to cart and complete check out. After the order was placed, the item's count in US location went from 0 to -1.