Steps to replicate:
1. Login to admin panel
2. Create article
3.You will notice that sometime ,it will stop working and you can see root location error
4.Sometime,it also shows that article currently you are working on cannot be accessed.
5. You need to close that season and login again
8. Sometime when you try to open the article that you were previously working on , you still have issue opening.

I managed to reproduce this issue on 1.4.1. Simple leave admin panel open in your browser for more then 3h, and once you are back, you can see the "Can not load root locations" red notification. You can't do anything in the control panel at /ez.