In Cubase 12.0.20/OSX 11.6.6:
Noticed today that when muting a parent folder that contains a nested folder of instrument tracks, the tracks within that nested folder will mute. However, when un-muting the parent folder, the instrument tracks within the nested folder will remain muted (though the nested folder track itself is unmuted).
What is odd is that soloing the parent folder behaves as expected: all parent and nested children tracks are soloed and un-soloed. It seems to be just un-muting that is the problem.
“Deep Track Folding” doesn’t seem to affect this. Am I missing some preference, or is this a legit bug?