setState(...) error from the roles page

[squall]

When I am working with /admin/roles page, the development tool sometimes alert with the warning as following "vendors.js:879 Warning: setState(...): Can only update a mounted or mounting component. This usually means you called setState() on an unmounted component. This is a no-op. Please check the code for the User component."

reappear method: click [/admin/users] -> [edit] -> [Permission] -> [/admin/roles]