civicrm_financial_item has wrong amount when overriding line item price

I'm pretty sure this is new behaviour so it seems like a bug.

When adding a membership via the "Add Membership" or "Submit Credit Card membership", the contribution amount is prepopulated with the membership price.
However, if the user overrides this, the resulting entry in civicrm_financial_item still has the original default price instead of what the person paid.

The contribution and transaction look good otherwise.
I don't think there's a reason why financial item table should list a different price.
For example, when using event discounts (via CiviDiscount), financial item amount is the discounted price (which I think makes sense).