iPad Some apps do not update

Yesterday I tried updating 6 apps but my iPad crashed and restarted almost immediately.
Since the these three apps are in state waiting, icons greyed out and an empty progress bars.
I have rebooted the iPad, no success.
I have removed the apps and replaced them via iTunes, no success.
Today another app update was available that installed normally, the other six are still "waiting".

My next step would be to recover to an old backup or something, but before that I am posting this thread to maybe get a less dramatic solution.

 

Thanks for your tips.

While trying to reinstall the apps via iTunes I also removed some movies.
The apps did not install yet, with about 5GB of free space.
I now removed more movies and there is now almost 12GB of free space according Setting/Info.

Still not updating.

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Performed the reset (hold power and ome button until restart).
Apps are still waiting...

Another app that had an update installed without problem while the other keep waiting.

Keep the good ideas coming, for now I wish you good night or good day if you are on the other side of the world.

 

Today performed a backup restore without return to factory settings, which did not work. Still waiting.

Then did the factory settings first and then the restore and that finally solved the problem.