Default [Q] Some Problems with Nexus 5 Designs..

Today i finally received my OnePlus One and was happy to play around with the Designs.

When it comes to the Nexus 5 of my GF it always crashes with "Design-Storage was closed"? (I don't know if this is the correct translation for "Design-Speicher wurde beendet" in German)

In some threads i read that only a Factory Reset helps. Someone has an idea to get this running without doing so?

Nexus 5 runs CM11 M8