I edited the existing "Shopping cart block" provided by commerce order module. I enabled ajax in that view, and added a exposed filter field. The filter field is in line items and it is a term reference. This is how I added the field #2425987-6: Product prices not updating correctly in cart block when using commerce pricing attributes and/or a rule that adds to base price .
In this case I don't see that ajax json, but I see an error
Notice: Only variables should be passed by reference in commerce_cart_product_add() (line 1344 of /var/www/drupalvm/commerce-7/sites/all/modules/commerce/modules/cart/commerce_cart.module).
I'll investigate more. I know this is too late to ask.. but if anyone having the same issue can you please add a comment with exact steps how the view was created, what exposed filters are added, so that I can replicate.