UE4.25 Audio Engine Bugs - Update from 4.22 - need help!

Uhhhh guysss, I am having the EXACT SAME issue here, so glad I found this thread!
We moved from 4.22 to 4.24 and than 4.25 too.
Though setting UseAudioMixer=False results in having no sound AT ALL…
What am I doing wrong here?