We are not aware of any issues with the mobile app that would prevent your images from completing upload or that would cause symptoms such as you have described.
A first suggestion is that you log completely out of the app on your device and then ensure it is not running in the background and then launch it, log in and try again. Please be sure that if you have the device set for use while only on WiFi that you are in range for WiFi.
If the difficulty persists you could also try uninstalling the app and then reinstalling it on your device.
Should you continue to experience difficulty, please file a support case using the Support Icon on the Auctiva website or the Help option within the app and let our agents know the difficulty you are facing. Please be sure to include the make and model of your device as well as the version number of the app you are using and our support team will be happy to look into it for you.