I try to explain what happens, sorry if it is unclear:
When I open one file Solo is lit on Output. When I press it Reverb also gets lit as do Mute on all other channels.
I close the project without saving.
I open and instead I press Solo on one of the channels ALL Solo gets lit
I close the project without saving.
I open and instead I press Mute on any channel ALL Solo gets lit
Load Sounds for Unassigned Instruments takes out all the lights.
Now if I press Solo on any instrument ALL solo gets lit except Output
Load Sounds for Unassigned Instruments takes out all the lights.
If I press Mute on an instrument it gets lit and ALL Solo gets lit except Output
If I press Solo on Output it gets lit as well and can’t be switched off.
I tried a couple of other pieces and there the mixer is functioning properly.
Is the file corrupted somehow? Can something be done?