Thank you Takayuki for your work and your support!
There isn’t this plugin installed.
I love Contact Form 7 and for this reason I’ve installed it in a lot of websites.
I am experimenting this new problem in all sites where I’ve updated it to 4.4.2.
When I complete the form it codes this:
<div class="wpcf7-response-output wpcf7-display-none wpcf7-mail-sent-ok" style="display: none;"></div>
Mail sending is ok, but there isn’t Success quote visible, and it’s not traced from Google Analytics goal conversion.
I hope this can be helpful, thank you so much, let me know