I have found that pre-installed Gmail app cannot sync with my gmail account when DX is connected to WiFi, while another Gmail account tied up with stock Messaging app still can get pushed. When I set up the not-being-updated account to stock Messaging app, it perfectly gets pushed emails within a minute or so. I have checked all the related setting (auto-sync, backgound data, gmail sync), and they are ok. So, apparently, neither google nor phone setting are causing this problem. Does anybody have the same issue? Is this a bug of the native gmail app? If not, please help!!!