Bug: Checkout Grants Round 12

**Describe the bug** When accessing a friend's grant proposal it appears that the combination of both a BNB token wallet and ETH wallet made the checkout show empty although the cart shows the item added

**To Reproduce**
> Go to grant https://gitcoin.co/grants/3986/know-the-blocks-maven
> Add to Cart
> Go to cart showing 1 item
> Returns empty cart at checkout w. Error message ZKSync checkout not supported due to the use of the token BNB

**Expected behavior**

- Expected to be able to see the item in the cart at checkout page
- Expected to be able to change the token to from the troublesome BNB to ETH
- Work around adding another grant to the cart with ETH address allowed the cart to function and show the option to change token although it had defaulted to ETH

**Screenshots**
Can not see in the menu a link to upload media so links to discord posts of issue
https://discord.com/channels/562828676480237578/783772122992476231/920099305195462686
https://discord.com/channels/562828676480237578/783772122992476231/920097793593450556
https://discord.com/channels/562828676480237578/783772122992476231/920097245112721438

**Desktop (please complete the following information):**
- Device: AMD Ryzen 4000 series
- OS: AMD
- Browser: Chrome & Edge
- Browser Version: Latest

**Smartphone (please complete the following information):**

- Device: Samsung s9
- OS: Samsung
- Browser: Chrome (mobile)
- Version: Latest versions

**Additional context**