issue with cart components

I've updated my store to use the cartSummary and cartContents components. I've encountered an issue when I return to the cart from checkout. Here's how to reproduce:

1. Add an item to the cart
2. Click [Proceed to checkout]
3. When the first checkout screen appears, click on the cart icon above the checkout flow
4. The cart appears. The cartContents component renders, but the cartSummary does not.
5. The spinner gif keeps spinning, but never disappears.

Would someone be able to fix this?

Start by reproducing the checkout-to-cart flow described in the issue, then inspect how the cartSummary and cartContents components load when returning through the cart icon. Done means cartSummary renders alongside cartContents and the spinner stops instead of spinning indefinitely.

Written by the indexing model from the issue text.