Laravel Session Flash Message not showing on live server but shows on localhost

When I flash one particular message it shows on localhost but not on production server. What can be cause of this problem.All other messages are shown but not this one

//Blade Template
@if (count($errors) > 0)
    <div class="alert alert-danger">
        <a href="#" class="close" data-dismiss="alert" aria-label="close">&times;</a>
        <ul>
            @foreach ($errors->all() as $error)
                <li></li>
            @endforeach
        </ul>
    </div>
@endif

@foreach (['danger', 'warning', 'success', 'info'] as $msg)
    @if(session('alert-' . $msg))
        <div class="alert alert-">
             <a href="#" class="close" data-dismiss="alert" aria-label="close">&times;</a>
        </div>
    @endif
@endforeach

//Controller Code
return redirect('url')->with('alert-danger','All lines are already reserved, Please try again later.');

``

via Chebli Mohamed