Capistrano Deploy hangs on bin/restart

I have a capistrano deploy script that works great except for the restart task. I have it run bin/restart but it never returns control back. The restart does actually work it's just that capistrano doesn't realize the command is finished. I've even run an 'ls' command afterwards "some_path/bin/restart;ls" and have tried returning true "some_path/bin/restart;true" but neither helped. The ls command ran and returned a listing but never 'exited'.

The restart task is below (site contains the rails deployment directories/symbolic links).

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set :deploy_to, "/home/<username>/webapps/<application>/site"
namespace :deploy do
  task :restart, :roles => :app, :except => { :no_release => true } do
    run "#{deploy_to}/../bin/restart"
  end
end

Oddly I can run from the command line in a normal ssh session and it works fine - restarts in a couple seconds.

Any ideas?