After project deletion, project tab is not accessible without logout & login

I am not pretty sure whether it was fixed in releases after 3.9.6, but I have seen such bugs in translate.openstack.org - Zanata 3.9.6.

How to re-iterate the bug:

• Click a project which you want to delete in https://translate.openstack.org/project
• Delete a project in the project setting
• After then, going to https://translate.openstack.org/project will generate an error - such as the page is not accessible