rails 3 flash message not displayed on mobile - ruby-on-rails-3

Question

My app enables images uploading.
The user , if successful , receives a success message:
the controller:
def create
#rating = Rating.new(params[:rating])
respond_to do |format|
if #rating.save
format.html { redirect_to #rating, :notice => 'Got It!',
:flash => {:notice_small => 'Your photo has been uploaded. good luck with its coolness rating!'} }
format.json { render :json => #rating, :status => :created, :location => #rating }
else
format.html { render :action => "new" }
format.json { render :json => #rating.errors, :status => :unprocessable_entity }
end
end
end
the view:
<br>
<br>
<div style="height: 100px;" class="visible-tablet visible-phone"></div>
<p id="notice" class="big_notice"><%= notice %></p>
<% if defined? flash[:notice_small] %>
<p id="small_notice" class="small_notice"><%= flash[:notice_small] %></p>
<% end %>
which works fine on desktop. but not on mobile :-(
the pictures are uploaded but i just don't get the confirmation message
Edit:
I viewed the source on mobile and displays the html like so
<p id="notice" class="big_notice"></p>
<p id="small_notice" class="small_notice"></p>
meaning that the flash[:notice_small] is defined(notice the if defined? flash[:notice_small] condition) but it's just empty