My obnoxious solution to this after restoring a backup multiple times: delete all your apps, and reinstall them. This ALMOST fixed it. It's a pathetic solution

My obnoxious solution to this after restoring a backup multiple times: delete all your apps, and reinstall them. This ALMOST fixed it. It's a pathetic solution, but it worked when nothing else would including "set up as a new phone". The apps had to break, then be deleted and reinstalled a second time, to finally work. The other issues with 11 remain however.