Bug? App Bar Navigation link URL change is breaking Next.js apps (and the tutorial)

[hedgerh]

Reposting this to make sure there's visibility that it's a bug.

For some reason, the app bar nav link URLs now have `/`s added to the end of them.  This is breaking routing in Next.js apps, causing 404s.  The tutorial must be broke as well, because of this.

Steps to reproduce:

1. Spin up a new project with the Shopify CLI

2. Create a random page in your Next.js app

3. Add a navigation bar link to the random page

4. Run `shopify serve` and install your app in a dev store

5. Click the link and observe that it 404s

Someone else confirmed it in my previous thread https://community.shopify.com/c/Shopify-APIs-SDKs/Shopify-App-Embedded-App-Navigation-Bar-adding-tra...

[Hnguyen720]

The tutorial is broken. 

You can check out my post: https://community.shopify.com/c/Shopify-APIs-SDKs/Hitting-Connection-Limit-on-Heroku-and-ngrok-durin...

[hedgerh]

This may have been fixed.  The `/` stopped showing up in the URLs for me.