Unity/Fmod event levels differ

Hello,
i’ve got a weird problem: One nested event is playing nearly 30db quieter in Unity compared to playback in FMOD.

The Parent Event is an Ambient Sound and I used the nested Event to host my scatterer Sounds. I use this workaround, because when I placed the Scatterer Directly in the Parent Event , it became spatialized…

I used the same workaround in a different event and there it works fine.
And im using FMOD 2.00.02 and Unity 2018.3.12f1.

Does anyone have an Idea?

If you have one event that works as expected and the other that does not, what are the differences between them? It could be caused by different encoding, on either the bank or the source assets.