I started the app and import 2 pictures from my libary on my iPad.
i was copying an area and paste it into another picture. After this the colour was going in a not specific way which was not my plan. Look at the file, i think this is an issue with the app. It can not be fixed with restart the app or restart the ipad OS.
What version of the application and what version of iOS are you running on? Wpould you be willing to share the file for trouble shooting? From assets.adobe.cpom select share from the ellipsis menu (...) and copy and send the url. If privacy is an issue you can DM me the url