There is a bug i mentioned in Resolve 15.1 which unfortunately remains in Resolve 15.2
While editing, audio is fading out even though there is nothing that indicates an audio transition in the timeline. However, when a change to the Fairlight Tab an audio transition appears out of nowhere.
When i switch back to the Edit tab the audio transition becomes invisible again but is still active on the clip's audio.
I hope someone in BMD is working to fix this.