Distance (UE.Attenuation) randomly resets to default value when triggered by Event Key Pressed

Hi,

so I am triggering a metasound through a event key press. The frequency pitch of the sound is mapped to the Distance(UE.Attenuation). The issue is that every now and then the distance resets it self to default value and than comes back at the correct one again.

This never happens for longer sounds that are played throug EventBeginPlay. Not sure how to tackle this issue. Any ideas? Thanks in advance