Sorry i installed the new release of the plugin yesterday but i have the same result.
Accessing from my IPHONE i receive the message " comment is inserted" but really the comment is lost.
All work correctly if i put the plugin in disabled mode or switch my IPHONE in standard mode using the switch ON-OFF of plugin.
It seems the comments.php command is searched on the URL and not in the SITEURL.
Thank you so much for your help.