Rails upgrade from 3 to 4 broke the flash messages on redirect -

<4> After any upgrade from Rail 3 to 4 Rail, any Flash message does not work after redirection.

Here are some examples of redirects. Notice: "Your account has been updated"}) redirect_to (root_path, notice: "Your account has been deactivated"

Has been. ") User_account_path (Anchor:" Network ") Redirect, Note:" Your primary network has been changed. "

Any problem that could have caused the problem?

View / layout / app here. Hmm

  - unless Flash.empty? - Flash.Each | Name, msg - Until the next: [Warning, error :, notice]. Include? (Name)% p.flash_message {id: name} = msg  

By the way, without any redirect flash works fine. So, I know that the problem is not with the scene.