That's really sad to hear. hopefully they iron it out.For me, it would say "copying" and would stay at 0% or move at a total snail's pace. It's why I rolled back to the current firmware. Word of warning though, if you have games installed to an external hard drive with custom folders, rolling back causes those folders to disappear and the games to be out on the main menu unorganized (games downloaded to system storage remain in their original folders).
Yes, it's the free stuff from FFXV (The assassins event). If I click the "waiting to install" notification it reads "The content does not exist in the PlayStation store" or something like that. It's really weird.Have you tried starting the game that the DLC is for? I had DLC for Star Wars Battlefront not install until I started the game.