Astro a50 sound?

Moin dear people. Today I bought an Astro a50 (4th gen) for the Ps4, connected it and tested it. I get the sound through my monitor and headset. I always have to set the sound from my monitor to volume 0 every time I restart. Is there a solution for this? According to the operating instructions, "Output via headphones" only needs to be switched to chat audio in the Ps4 settings.

Normally it should go like this…

Unfortunately it does not work…

Okay… I'm fine.