How are you loading the image, i.e. can you show some code?
This issue haunted me for days, i almost tried everything possible to try to solve this problem,
except one thing i havent tried, which is change the APK name every time i export it to mobile.
what i used to do is, every time i want to export a new APK, i delete the one exported before with uninstalling its app, and then export it again to the device with the same name.
and that was the problem and changing APK name was the solution.
its like if you want to add a new image to your app, APK name should be different than the previous name.
Thanks for your reply, and sorry for the false alarm.