Unreal 4.18.1 IOS app icons will not deploy - always come is as unreal icon

When we deploy our IOS app we can not get the app icons to come through. No matter what we do we still get an unreal icon when we deploy to our device. When we open up the .ipa file we can see all the app icons are unreal icons even though we have them all set in the IOS project settings.

We have tried unzipping the ipa file and replacing all the unreal icons with our own with the same names and still no luck. When we deploy it to the device we still get unreal icons.

Without our icon deploying to the device we can not submit it to the app store.

Any help would be really appeciated.
Tom

Please have a look here: https://forums.unrealengine.com/development-discussion/ios-development/1384017-418-how-do-i-change-the-ue4-packaging-ios-icon?p=1400274#post1400274