Click and pops when changing songs

After more testing with this song

Artist: Jonh Stanford
Album: TimeScape
Track: The approaching light

At 2:20 I can hear clipping. So I tried the headroom management with -3db and also the show clipping indicator active. What is strange the color doesn’t turn red so Roon don’t see clipping.

But the noise (clipping) is gone.

What is the difference between Headroom Management and the Volume leveling ?

When I get my streamer DAC will I have those clipping ? At the moment all my FLAC files store on my NAS as no replain gain embeded into the FLAC Files.