If you solo a track and then hide it, it looses it`s solo status / stops being soloed
If you mute a track and then hide it, it keeps it`s mute status / keeps being muted
This is inconsistent behaviour. Solo status should be maintained on hidden tracks just like mute does.
Also, when working an an Icon D-Control, D-Command or S6 this works as expected, all hidden tracks then keep their solo and mute state.
I`ve seen this on every PT HD 12 - 12.8.1 system I have tested