Steam Friends List and Name not working after packaging

Hey there,

I have a steam game set up with an own steam app id. Creating sessions, joining via Lobby is working in PIE and shipped on steam. But friends lists and getting the steam name only work in PIE or when started as a standalone game with PIE. It’s using the correct appid. but after packaging the name and friends lists functions don’t work anymore - returning nothing. I’m using online subsystem steam and advanced steam sessions in 4.27.

Do you have any idea where in the packaging process I’m missing out something?

thanks a lot!