Steps to reproduce:

1. Log in to storefront.
2. Add product to cart with price 5
3. Log in to back office.
4. Change product price to e.g 5.50 
5. Save the product.
6. Refresh /cart page

Actual result:

See attached screenshots.

After updating product price in back office to decimal value, product is removed from the cart.

Expected result:

Product is properly displayed in the cart with correct price value.