iOS Icon Assets missing with UE 4.18.0

There are assets missing in 4.18.0 when I upload my iOS app .ipa to TestFlight. I’ve put all the proper assets under iOS Settings in the UE4 editor, but as you can see below some of the AppIcon*.png assets are showing the default Unreal Engine png.

AppIcon20x20@3x.png, AppIcon20x20~ipad.png, AppIcon29x29@3x.png, and AppIcon40x40@2x~ipad.png are afflicted.