Quality loss in Standalone Testplay

I stumped over this Problem and can´t find a solution…

Viewport Testplay:

Standalone Testplay:

There is a heavy quality loss… Especially at the Title. The Text is a 3D Mesh with a Gold Material.
My Quality Settings in the Quick Settings are all on Epic.
Lightmap is built with no warnings/errors, on Lighting Quality “Production”

Any idea what causes this Quality drop, and how to fix it?