When you navigate through the browser history, the replace state mount points are out of sync with the store. 1. Start the demo 1. Navigate to counter 1. Increment the first counter which is a pushState mounpoint 1. Increment the second counter which is a replaceState mountpoint 1. Click browser back button 1. Observe the second counter value is 1 1. Refresh browser 1. Observe the second counter value is now 0