On a whim, I deleted the app, then reinstalled it which corrects the issue. Maybe a caching glitch for the splash screen?
All I know is that the issue happened immediately after the iOS 14.0 update. Both iOS 14.x devices (mentioned above) exhibited the issue and both devices had the issue corrected when the app was deleted, then reinstalled.
If one chooses to delete the app to clear the glitch, *back up your save games first* (I back mine up on a daily basis...Cloud saves would be a welcome addition as one otherwise needs to use iTunes File Sharing to backup and restore the save games).
I just now see the a new version has been released (v3.0.107) but this version has not yet hit the Apple App Store...so it appears that this newer v3.0.107 is likely not the source of the splash screen fix; it's the process of deleting, then reinstalling the app. In my case, the iOS app version is still v3.0.105.