Channel Manager - Error while accessing Dutch site while I am edititng English site

1. Log-in to CMS with admin user-id
2. Navigate to Channel Manager
3. Select "English Website" and click "Open channel" on right pane
4. "Go Green United States" site open in preview tab
5. Navigate to "Edit" tab and Video to one of the container
6. Navigate to Channel Summary
7. Select "Dutch Website" and click "Open Channel" on right pane
8. "Hippo Ga Groen Netherlands" opens in preview mode
9. Navigate to "Edit" tab"

Actual behavior - Error is shown, where in user is not able to perform any action on the page. Refreshing the whole page takes you back to dashboard (Jannis had a look on this in my system already)
Expected behavior - Error should not be shown rather appropriate warning message would be helpful.