[Bug] Intercom breaks on SPA while navigating back & forth via browser navigation buttons

To reproduce this bug I used this repository project https://github.com/intercom/example-single-page-app-install which contains bare minimum - react router & intercom. Follow the instructions to set it up in repository description.

Steps to reproduce:

1. Open the project on new tab/page (without any navigation history)
2. Click on About and then on Home links
3. Open up the intercom and wait till it loads it's contents
4. Go back in navigation history 2 times
5. Go forth in navigation history 2 times
6. Intercom breaks / becomes unresponsive and transparent

There may be more ways of reproducing this bug, but this is the most consistent that I found.