Sound not muted (bug?)

[Perry Kappetein]

I modified several midi files, and added CC7 where i turned the volume to 0

but once I play it on my keyboard, the sound is still there.  so I am kinda confused on what I am missing here?

I open the track and go to piano roll, and add a new item Volume and draw a line for the whole track

I do see that at the end, it has a channel which is set to 1.  

Even through I am on track 4,5 or 10

Edited August 7, 2019 by Perry Kappetein

[Perry Kappetein]

I am going through some of the files, and I see that the items for CC7 are set to a Max volume of 127

While I am 100% sure, I wrote the line at the bottom.

Since this is happening randomly.  Could this be a bug?