So recently I experienced a different issue in Magento 2.2.5, related to the shopping cart persistent.
Basically what happens is when a customer is logged in with a product in the cart, and this customer session expires, Magento throws a report error:
"0":"No such entity with customerId = ","1":".
A way to solve it is clearing the browser cookies, in specific
persistent_shipping_cart. When this cookie is removed, the store frontend returns and the customer is able to use it once again.
Anybody already had a similar issue before? Any advice about how could I fix it? For now, I just let the persistent disabled to avoid customer issues or sales block.