The basic functionalities do not work

You cannot check in smoothly, although the app stores your booking you cannot automatically check in, you have to re-enter booking ref.

Also boarding passes are not automatically uploaded to the app, you have to yet again do it manually by providing booking ref 3rd time.

The ONLY benefit of having the app in the current form vs checking in at the airport is that after all the effort you have the boarding pass in your phone.
It was working perfectly fine in the previous version.

Ds1237233 about Lufthansa, v5.0.1