Tech Community navigation broken

I'm not sure when this started, but I've discovered that navigating to a previous page with the Back button in the browser is broken in certain scenarios.

Steps to reproduce:

1. Sign in to Home | Microsoft Community Hub
2. Click on your avatar and select Profile. You should now be on your profile page
3. Click on a reply to a post in the list of Recent Discussions
4. Click on the Back button in your browser

Expected result:

You are back at your profile page

Actual result:

You are still viewing the post you clicked on in step 3. If you click the Back button a second time, you will be taken to the page you were on before you opened the Tech Community home page.

Edit: Further testing reveals this happens specifically when you click on a reply to a post in "Recent Discussions".