multiple channel selection in the mixer (e.g. to change parameters in all channels simultaneously [with ⇧⌥])/ or multiple track selection in the project window. (here I refer to mac only) Scenario:
a. I select channel 3
b. Then I also select channel 5 with ⌘.
c. Then I use ⇧ to extend the selection to channel 7
d. Now, Channel 3, 5, 6 and 7 should be selected, but not channel 4. However, channel 4 is selected also instead.
(This type of selection works, for example, in the Mac Finder and in Apple Music, but not in NI Traktor)