In-game audio not working when playing in "selected viewport" mode

As the title says, the audio is not working when playing. It does work when I as a “standalone game” though.

These are my settings:


I don’t know if I missed other audio options… I also tried restarting UE4 twice after setting the options, but nothing changed

Today is working, even though I didn’t touch ANY of the options anymore. No idea what happened.

have the same problem right now 0_0
some randome bugs are rly nasty