Volume fader Bug

[Magagaia]

Hi, it's been a while I have a strange bug: some volume faders go completely down by themselves with no action of mine. It is very annoying for mixing. Am I missing something? Does anyone know what happens? Thanks!
Maga

[RobrechtV]

You may have accidentally recorded volume automation on those tracks. Check if there's a red dot on the volume box like in the picture (marked "2").



If so, you can right click the volume box and "Delete automation" to make the volume stay constant again.

For more info, here's the Ableton Live manual page on automation.