Maybe I’m not understanding this correctly.
I record some midi data. All plays back fine.
Go into piano roll and change the midi channel of some of the notes.
Change the midi track channel to ‘any’.
(If I may jump in here) Because the setting that controls the volume of whatever is on that channel is different from the previous one. Could be Volume CC #7, and many VSTs use the mod wheel CC #1 to control it.