Currently setting up some classroom iPads and using Device based VPP so they don't require an apple ID. Also making sure the app installs automatically. I did this 7 months ago and it worked fine. Now I'm doing it again and some apps are prompting to sign into an Apple ID to download even though the app is in the App Catalog using device based assignment (the VPP Content tick box is ticked). We have 100's of license spare compared. Not sure what else could be causing this.
Most of the apps are working fine but IMovie and iMotion will not install without an apple ID and I'm fairly certain these are device assignable.

